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A D V A N C E   P R O G R A M M E    |   P R O G R A M M E   P R E L I M I N A I R E

Nice Acropolis, Nice, France

10-15 September 2000

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 . CLEO/Europe-IQEC 2000
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CLEO/Europe-IQEC Technical Program - WEDNESDAY

12 - 14 September, Nice Acropolis, Nice, France

 

MONDAY

TUESDAY

WEDNESDAY

THURSDAY

FRIDAY

TUESDAY POSTERS WEDNESDAY POSTERS THURSDAY POSTERS

 

ROOM 1
 
08:30 - 10:30
Session: Optical Measurement Techniques: Surface Sensing
Presider: Ove Steinvall, Division of Laser Systems (FOA 32), SWEDEN
 
 
CThA1 8:30 - 9:00 (Invited)
Light-in-flight Recording and Relativity, Nils Abramson, Royal Institute of Technology, Stockholm, SWEDEN
In gated viewing the spheres of observation are transformed into ellipsoids of observation if the point of observation is separated from the point of illumination, independent on if this separation is static or caused by velocity.
 
 
CThA2 9:00 - 9:15
Optical Correlation Technique for Characterizing Rough Surfaces, O.V. Angelsky, Chernivtsy University, UKRAINE
Development of an new optical correlation technique and the device implementing of it for diagnostics of rough surfaces is considered in this report.
 
 
CThA3 9:15 - 9:30
Color-Coded Optically Profilometry with >106 Optically Resolved Depth Steps, Erez Hasman, V. Kleiner, Technion-Israel Institute of Technology, Haifa, ISRAEL, Nir Davidson, A.A. Friesem, Weizmann Institute of Science, Rehovot, ISRAEL
A novel method of rapid three-dimensional optical profilometry with extended depth-measuring range and extremely high axial and lateral resolution exploits polychromatic illumination, diffractive optics and color coding and decoding techniques.
 
 
CThA4 9:30 - 9:45
Measurements of Optical Losses in Thin Films, Stephan Logunov, Corning Inc., Corning, NY, USA
Three different approaches for detection of optical losses in thin films in the telecommunication optical window are discussed. Results of Cavity Ring Down, Photothermal, and Propagation Loss techniques are presented.
 
 
CThA5 9:45 - 10:00
Optimal Measurment Configurations for Inverse Scattermetry, Emmanuel Drege, University of Texas, Richardson, TX, USA, Dale Byrne, University of Texas, Richardson, TX, USA
Information content analyses for lithographic process monitoring are performed to determine the set to scatterometry measurements that most optimally yields surface relief profile parameters. We include polarization, angle of incidence, diffracted order, and
wavelength in our investigation.
 
 
CThA6 10:00 - 10:15
Real-Time Optical Coherence-Domain Reflectrometry with an Angular Dispersion Imaging Scheme, Kin Pui Chan, Eriko Umetsu, Naohiro Tanno, Yamagata Technopolis Foundation, Yamagata, JAPAN
A static optical-coherence-domain reflectometer based on interferometric cross correlation is presented. Direct visualization of the envelope of the correlation is made possible with an angular dispersion imaging scheme. Real time imaging is presented.
 
 
CThA7 10:15 - 10:30
Passive IR Polarmetric Remote Sensing of Antipersonnel Mines Using Cellular Neural Networks, P. Lopez, Universidade de Santiago de Compostela, Santiago de Compostela, SPAIN, M. Balsi, University LaSapienza, Rome, ITALY, D.L. Vilarino, D. Cabello, Universidade de Santiago de Compostela, Santiago de Compostela, SPAIN
We propose a novel approach for antipersonnel mine detection in infrared images. A sequence of images at different time intervals is taken as the input of a reconfigurable Cellular Neural Network architecture. Then, a training algorithm is applied in order to find the
optimum network topology and weights for solving the mine detection problem.
 
 
 
13:30 - 15:30
Session: Optical Measurement Technologies: Liquid and Gases
Presider: Nils Abramson, Royal Institute of Technology, SWEDEN
 
 
CThG1 13:30 - 13:45
20 km Distributed Temperature Sensor Utilising Spontaneous Brillouin Scattering, D.J. Webb, V. Lecoeuche, M.W. Hathaway, C.N. Pannell, David Jackson, University of Kent at Canterbury, Canterbury, Kent, UK
We describe a novel approach to distributed temperature measurement using spontaneous Brillouin scattering. The system incorporates a mode-locked Brillouin fibre laser and enables temperature measurements over 20 km with a spatial resolution of 7 meters.
 
 
CThG2 13:45 - 14:00
A Fibre Laser Sensor with a Cavity Formed by Reference and Sensing Bragg Gratings, M.A. Basurto-Pensado, E.A. Kuzin, M. May-Alarcon, INAOE, Puebla, Pue., MEXICO, M.G. Shlyagin, I. Marquez-Borbón, CICESE, Ensenada, B.C., MEXICO
We investigate intensity hops and the longitudnal mode beating frequency at the output of Er-doped fiber laser formed by the Bragg gratings when one of them is heated or stressed. We show that this technique may be used in simple and relatively cheap sensors for detection of alarm condition.
 
CThG3 14:00 - 14:15
A Camera to Record Underwater Particles Using Simultaneous In-Line and Off-Axis Hologrammetry and Its Associated Replay Facility, P.R. Hobson, Brunel University, Uxbridge, Middlesex, UK, V. Chalvidan, Holo 3, Saint-Louis, FRANCE, G. Craig, Aberdeen University, Aberdeen, UK, G.L. Foresti, S. Gentili, University of Udine, Udine, ITALY, R.S. Lampitt, Southampton Oceanography Centre, Southampton, UK, B. Lucas-Leclin, Quantel, Les Ulis, FRANCE, H. Nareid, Aberdeen University, Aberdeen, UK, J.J. Nebrensky, Brunel University, Uxbridge, Middlesex, UK, A. Pescetto, University of Genova, Genova, ITALY, G.G. Pieroni, University of Udine, Udine, ITALY, M.A. Player, Aberdeen University, Aberdeen, UK, S. Serpico, University of Genova, Genova, ITALY, K. Tipping, Southampton Oceanography Centre, Sothampton, UK, A. Trucco, University of Genova, Genova, ITALY, J. Watson, Aberdeen University, Aberdeen, UK
The design and construction of an underwater holographic camera to record marine plankton to a sea depth of 100m is described. Holograms are recorded using both in-line and off-axis techniques simultaneously with a 532 nm Nd-YAG laser.
 
CThG4 14:15 - 14:30
All-Optoelectronic Solutions for Process Tomography, K.B. Ozanyan, S.J. Carey, F. Hindle, H. McCann, D.E. Winterbone, S.W. Young, J. Black, UMIST, Manchester, UK
Opitcal Tomography relies on the performance of each individual optical channel. Single channel designs for imaging of hydrocarbon concentration in gasoline engines, as well as the NO2 distribution in the exhaust of turbines, are discussed.
 
 
CThG5 14:30 - 14:45
Widely Tunable GaInAsSb/GaAlAsSb Quantum Well Continuous Wave Lasers for Gas Analysis Above RT, Aurore Vicet, D.A. Yarekha, G. Glastre, A. Perona, B. Fraisse, A.N. Baranov, Universite Montpellier II, Montpellier cedex 05, FRANCE
Diode lasers operating continuously up to 130°C have been fabricated. Above RT the emission wavelength could be tuned from 2.25 to 2.45 µm. The lasers have been used for detection of CH4, CO and HF.
 
 
CThG6 14:45 - 15:00
Temperature and Concentration Dependence of the Lifetime of a Praseodymium Excited State in Fluorozirconate Glass, S. Trpkovski, T. Nguyen, P. Farrell, G. Baxter, S. Collins, Victoria University, Melbourne City, AUSTRALIA
Measurements of the lifetime of an excited state of praseodymium in ZBLANP demonstrate the lifetime is independently affected by temperature and dopant concentration. We predict a dopant concentration at which the lifetime is temperature independent.
 
CThG7 15:00 - 15:15
New Developments of the Laser Diagnostic System at DropTower Bremen, Wolfgang Triebel, D. Grebner, D. Mueller, Inst f. Physikalische Hochtechnologie e.V., Jena, GERMANY, C. Eigenbrod, J. Koenig, University of Bremen, Bremen, GERMANY
The excimer laser based diagnostics system at drop tower Bremen has been improved and extended to investigate different combustion process under microgravity. OH and formaldehyde distributions and temperature fields were measured by laser induced fluorescence.
 
 
CThG8 15:15 - 15:30
First Measurement of the Rayleigh Cross Section, W. Ubachs, H. Naus, Vrije Universiteit, Amsterdam, THE NETHERLANDS
The cavity-ring-down technique is applied to measure Rayleigh extinctions of Ar and N2 between 560 and 650 nm. Experimental and calculated cross sections agree within the experimental uncertainty of 1%.
 
 
16:00 - 18:00
Session: Stabilized and Microchip Lasers
Presiders: Paolo Laporta, Politecnico di Milano/CEQSE-CNR, ITALY
 
CThL1 16:00 - 16:15
Passively Q-Switched, Quasi-Monolithic Nd;YAG Ring Lasers with High Single-Frequency Output Power, M. Bode, I. Freitag, InnoLight GmbH, Hannover, GERMANY
Q-switched operation of Nd:YAG ring lasers is reported using Cr4+:YAG saturable absorbers. High stability is achieved by diffusion-bonding of the laser crystals, stable single-frequency operation by a nonplanar beam path inside the quasi-monolithic cavity.
 
 
CThL2 16:15 - 16:30
Amplitude Stabilization of a Co-Doped 2-µm Tn-Ho:YAG Laser, Stefano Taccheo, G. Sorbello, Politecnico di Milano, Milano, ITALY, Paolo Laporta, Politecnico di Milano/CEQSE-CNR, Milano, ITALY, Orazio Svelto, INFM/CNR-CSTS, Milano, ITALY
We report on amplitude-noise characteristics of co-doped Tm-Ho:YAG laser and on its stabilization. A relative-intensity-noise level of -110 dB/Hz is achieved from dc to the frequency of relaxation-oscillation peak, which is fully suppressed.
 
CThL3 16:30 - 16:45
High-Stability Diode-Pumped Er-Yb Microlaser Frequency Locked to a 39K Sub-Doppler Line, Ady Arie, Tel Aviv University, Tel Aviv, ISRAEL, Martin Fejer, M.A. Arbore, Stanford University, Stanford, CA, USA, F. Ferrario, Cesare Svelto, Politecnico di Milano, Milano, ITALY
We report on development of a novel diode-pumped Er-Yb:glass microlaser with improved long-term stability and reliability. By locking the second harmonic to 39K saturated line at 770.1 nm, we achieved a frequency stability of 10-12 for intergration times above 10s.
 
CThL4 16:45 - 17:00
Monolithic Nd:YAG Ring Laser with 0.5 W Single-Frequency Output Power @ 1.444 µm, M. Bode, I. Freitag, InnoLight GmbH, Hannover, GERMANY
Compact Nd:YAG lasers featuring 500 mW single-frequency output power at the eyesafe wavelength of 1.444 µm are presented. Stable single-frequency operation is accomplished bya nonplanar path inside a monolithic ring laser cavity.
 
 
CThL5 17:00 - 17:15
Amplitude Stabilisation of a 13W Master-Slave Nd:YAG Laser System for the Gravitational Wave Detector GEO 600, M. Kirchner, V. Quetschke, Universitaet Hannover, Hannover, GERMANY, I. Zawischa, Laser Zentrum Hannover e.V., Hannover, GERMANY, B. Willke, K. Danzmann, Universitat Hannover, Hannover, GERMANY
We present an amplitude stabilisation scheme for an injection-locked ringlaser system. Feed-back to the pump current is used to stabilise the amplitude of the slavelaser.
 
CThL6 17:15 - 17:30
Up to 350 MicroJoules with a Microchip Laser at 1064 nm, J.M. Maillard, D. Guillot, Nanolase, Meylan, FRANCE
Up to 350 microJoules were obtained at 1064 nm with a high energy passively Q-switched microchip laser pumped by a 18W fiber coupled diode. We got 110 microJoules at 1064 nm under 13 W pump power with a direct coupling scheme of the pump diode.
 
 
CThL7 17:30 - 17:45
Geometrical Coupling Effects in Microchip Laser Array, David Herisson, LETI/DOPT/SCOPI, Grenoble Cedex 9, FRANCE, Ph. Thony, CEA Grenoble/LETI, Grenoble, FRANCE, M. Rabarot, V. Marty, LETI/DOPT/SCOPI, Grenoble Cedex 9, FRANCE
We study the coupling phenomena of a 2D array of stable and unstable cavity microchip lasers and we show that the array can operate is several different modes determined by the geometrical configuration.
 
 
CThL8 17:45 - 18:00
Tilt Locking: A New Technique for Locking a Laser to an Optical Cavity, Daniel Shaddock, Malcolm Gray, Bram Slagmolen, David McClelland, Australian National University, Canberra, ACT, AUSTRALIA
Tilt locking is a simple technique providing an error signal for locking a laser to a cavity. We present results for locking two lasers to a cavity and for injection locking a high power laser.
 
ROOM 2
 
08:30 - 10:30
Session: Tutorials 5 & 6
Presiders: Pierre Chavel, Institut d'Optique, FRANCE, Luigi Lugiato, Universita di Milano, ITALY
 
 
TUT5 8:30 - 9:30
Quantum Cascade Lasers, Federico Capasso, Lucent Technologies Bell Laboratories, Murray Hill, NJ, USA
Quantum Cascade Lasers and their unprecedented power / spectral performance will be reviewed. High-resolution spectroscopy and wavelength stabilization as well as applications (atmospheric chemistry, trace gas analysis, environmental monitoring) will be discussed.
 
 
TUT6 9:30 - 10:30
Advances in Solid State Lasers Including Nonlinear Phase Conjugate Mirrors, Arnaud Brignon, Jean-Pierre Huignard, Thomson CSF LCR, Orsay , FRANCE
The spatial quality of solid-state lasers is often corrupted by thermally induced aberrations in the gain medium. This review shows that several type of reliable nonlinear phase conjugate mirrors are now ready to be used in laser systems. Depending on the required performances, it is possible to choose the most appropriate materials and laser architectures to obtain laser sources with excellent beam quality.
 
 
13:30 - 15:30
Session: High Power Diode Lasers
Presider: Anders Larsson, Chalmers University of Technology, Goeteburg, SWEDEN
 
 
CThF1 13:30 - 14:00 (Invited)
High-Power Diode Lasers Bars, >250 W, Michael Mikulla, Juergen Braunstein, Rudolf Kiefer, Martin Walther, Juergen Jandeleit, Fraunhofer Institut (IAF), GERMANY, Wolfgang Brandenburg, Gunter Weimann, Peter Loosen, Reinhart Poprawe, Fraunhofer Institut fuer Lasertechnik, Aachen, GERMANY, Gunter
Abstract not available.
 
 
 
CThK2 16:15 - 16:30
Novel InGaAsP/AlGaAs Multiple Wavelength Electrically Pumped Vertical Cavity Lasers Emitting in the 1.5 µm Waveband, A.V. Syrbu, V. Iakovelv, A. Rudra, C.-A. Berseth, Eli Kapon, Swiss Federal Institute
of Technology, Lausanne, SWITZERLAND, J. Boucart, Alcatel Corp Research Centre, Marcoussis, FRANCE, I. Sagnes, CNRS/CNET, Bagneux, FRANCE
Different wavelengths are obtained by air-gap variation inside double fused VCSEL structurs. Selective etching of air-gaps allows a precise control of emission wavelengths. Resulting structures are mechanically stable and have a low series resistance.
 
 
CThK3 16:30 - 17:00 (Invited)
Optically Pumped 1.3 Micron VCSELs, V. Jayaraman, M. Soler, T. Goodwin, M.J. Culik, T.C. Goodnough, Michael MacDougal, Frank Peters, D. VanDeusen, D. Welch, Gore Photonics, Lompoc, CA, USA
Long wavelength vertical-cavity surface-emitting lasers with an integrated 850 nm pump provide single-mode, high-power, high speed, and reliable operation. The wafer-scale pump integration allows low-cost manufacturing of single devices, arrays and WDM arrays at 1310/1550 nanometers.
 
 
CThK4 17:00 - 17:15
Pulsed Operation at All-Monolithic 1.55µm VCSELs with InAlGaAs/ InAlAs System, O.-K. Kwon, Byueng-Su Yoo, J.-H. Shin, Jong-Hyeob Baek, Bun Lee, ETRI, Taejon, KOREA
All-monolithic, air-post index-guided vertical-cavity surface-emitting lasers operating at 1.55 µm have been demonstrated under pulsed electrical injection at room temperature. The minimum threshold current density of the 30 µm-diameter has the value of ~4.7KAcm2.
 
CThK5 17:15 - 17:30
Optimisation of the Single Transverse Mode Output from a Surface Modified Vertical-Cavity Surface-Emitting Laser, Josip Vukusic, Hans Martinsson, Johan Gustavsson, Anders Larsson, Chalmers University, Goeteburg, SWEDEN
The single mode properties of an oxide confined VCSEL with a shallow surface relief have been numerically optimised. Maximum calculated single mode output power is 2.4 mW, compared to the experimental value of 2.2 mW.
 
 
CThK6 17:30 - 17:45
Lateral Confinement Layer Influence on Static and Dynamic Properties of Red Resonant Cavity Light Emitting Diodes, Mircea Guina, V. Vilokkinen, P. Sipilae, S. Orsila, T. Leinonen, M. Dumitrescu, P. Uusimaa, Pekka Savolainen, Mika Toivonen, Marcus Pessa, Tampere University of Technology, Tampere, FINLAND
Oxide aperture size influence on the static and dynamic properties of 650 nm resonant cavity light emitting diodes was evaluated. Devices grown by solid-source MBE were compared in terms of output power, bandwidth and thermal behaviour.
 
CThK7 17:45 - 18:00
Improvement of Diode Cascade VCSEL Performance, Thomas Knoedl, R. Jaeger, M. Golling, M. Miller, Karl Ebeling, University of Ulm, Ulm, GERMANY
We have fabricated diode-cascade vertical cavity surface-emitting lasers at 980 nm wave-length with two active pn-junctions coupled by an implemented Esaki-junction. Reducing current spreading in the cavity, continuous-wave room-temperature output characteristic in improved by more than a factor of two.
 
 
ROOM 4
 
08:30 - 10:30
Session: Frequency Conversion into the Visible and UV
Presider: Peter Smith, University of Southampton, Southampton. UK
 
 
CThB1 8:30 - 8:45
Efficient Cubic Third Harmonic Generation in KTiOPO4, Jean-Philippe Feve, B. Boulanger, Universite de Bourgogne, Dijon, FRANCE
An energy conversion efficiency of 1% is achieved for cubic third harmonic generation phase-matched in a KTiOPO4 crystal using a picosecond fundamental laser emitting at 1618nm. The interest for quantum optics experiments is discussed.
 
 
CThB2 8:45 - 9:00
Tunable Efficient CW Ultraviolet Generation in Periodically Poled Lithium Niobate, Richard White, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA, Stuart Butterworth, Microlase Optical Systems Ltd, Glasgow, UK, Don Warrington, University of Otago, Dunedin, NEW ZEALAND, Peter Smith, Graeme Ross, David C. Hanna, University of Southampton, Southampton, UK
We report the generation of single-frequency, 386-403 nm tunable, ultraviolet light by intra-cavity frequency-doubling of a Ti:sapphire laser in periodically poles lithium niobate (PPLN). 114 mW of ultraviolet power was generated close to the PPLM absorption edge.
 
 
CThB3 9:00 - 9:15
Anti-Phase Matching Behaviour in Laser Diode Injected Intracavity Doubled Ti:Sapphire Laser, Ajmal Mohamed, J.A. Pruvost, I. Ribet, M. Lefebvre, Emmanuel Rosencher, ONERA, Palaiseau, FRANCE
Injecting an intracavity doubled Ti:sapphire laser leads to a largely tunable (380 nm- 400 nm) UV single mode source presenting a minimum yield at phase matching conditions and still good efficiency injecting 8 nm away from phase matching maximum.
 
 
CThB4 9:15 - 9:30
Efficient Direct Frequency-Doubling of a 980nm Diode Laser Using an Aperiodically-Poled LiNbO3 Crystal, D.J.L. Birkin, E.U. Rafailov, G.S. Sokolovskii, Wilson Sibbett, University of St. Andrews, St. Andrews, Fife, UK, Graeme Ross, Peter Smith, David C. Hanna, University of Southampton, Southampton, UK
3.25 m W blue (490 nm) light has been generated from a frequency-doubled, gain-switched InGaAs/GaAs diode laser using an aperiodically-poled lithium niobate crystal.
 
 
CThB5 9:30 - 9:45
Tunable Single-Frequency Radiation at 596 nm, S. Spiekermann, Fredrik Laurell, Royal Institute of Technology, Stockholm, SWEDEN, I. Freitag, InnoLight GmbH, Hannover, GERMANY
Sum-frequency mixing of two continuous wave non-planar Nd:YAG ring oscillators at 1064 and 1357nm was realized to generate 16 mW of tunable, single frequency radiation at 596nm.
 
 
CThB6 9:45 - 10:00
All Solid-Sate Laser System for Generation of Tunable Radiation in the 350-1250 nm Region, A.V. Kachinsky, JV SOLAR TII, Minsk, BELARUS, A.A. Buj, JV SOLAR TII, Minsk, BELARUS, A.S. Grabchikov, R.V. Chulkov, Valentin Orlovich, National Academy of Sciences of Belarus, Minsk, BELARUS
Raman conversion efficiency to three Stokes components in Ti-Sapphire laser-pumped Ba(NO3)2 was obtained as 60%, 49% and 33% providing radiation from 350 to 1250 nm.
 
 
CThB7 10:00 - 10:15
All Solid-State Diode-Pumped Raman Lasers with Self-Frequency Conversion, Alexander Grabtchikov, A.N. Kuzmin, V.A. Lisinetskii, Valentin Orlovich, G.I. Ryabtsev, A.A. Demidovich, National Academy of Sciences of Belarus, Minsk, BELARUS
Operations of all solid-state pulsed Raman lasers on Nd:KGW and Yb:KYW crystals with kilohertz repetition rate pumped by cw diodes are demonstrated.
 
 
CThB8 10:15 - 10:30
High Efficiency, High Averge Power Second-Harmonic Generation in a Two-Pass Quadrature Frequency Conversion Scheme Using CsLiB6O10 Crystals, Hiromitsu Kiriyama, S. Matsuoka, F. Nakano, A. Sagisaka, Koichi Yamakawa, Japan Atomic Energy Research Institute, Kyoto, JAPAN
A high efficiency of 83% has been achieved for frequency doubling of a Nd:YAG laser in a two-pass quadrature frequency conversion scheme usingCsLiB6O10 crystals. A second-harmonic output of 27.3 W was obtained with 32.7 W of an input fundamental laser at 10 Hz.
 
 
 
13:30 - 15:30
Session: Pulsed Optical Parametric Oscillators
Presider: Eric Lallier, Thomson CSF LCR, FRANCE
 
 
CThH1 13:30 - 13:45
Optical Parametric Generator (OPG) for 1.38-1.56 µm with up to 0.5 W Average Power in 270-fs Pulses at 35 MHz, T. Suedmeyer, J. Aus der Au,
ETH Hoenggerberg, Zuerich, SWITZERLAND, Rudiger Paschotta, Ursula Keller, Swiss Federal Institute of Technology, Zurich, SWITZERLAND, Peter Smith, Graeme Ross, David C. Hanna, University of Southampton, Southampton, UK
For the first time we demonstrate single-pass femtosecond OPG pupmped at the full repetition rate of a diode-pumped mode-locked laser. We obtained 270-fs pulses with up to 0.5 W average power at a repetition rate of 35 MHz.
 
 
CThH2 13:45 - 14:00
High Efficiency Mid-Infrared Optical Parametric Oscillation in Thick Periodically Poled Lithium Niobate, Giuseppe Bellomonte, Arnaud Grisard, Loiec Becouarn, Eric Lallier, Thomson CSF LCR, Orsay , FRANCE
1 mm-thick PPLN samples were fabricated and used in 40% efficiency oscillators to yield up to 1 mJ around 4 µm with M2 better than 5, the highest mid-IR energy level reported in such crystals.
 
 
CThH3 14:00 - 14:15
Efficient, Single-Mode, Visible and Infrared Periodically Poled Lithium Niobate OPOs, Glenn Baxter, Philip Schlup, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA
We report pulsed, grazing-incidence, periodically poled lithium niobate optical parametric oscillators generating single axial mode, near TEM00 output with up to 46% slope efficiency. Pump wavelength selection generated tunable visible, near and mid-infrared wavelength.
 
 
CThH4 14:15 - 14:30
Pulsed Single-Mode Doubly Resonant Optical Parametric Oscillator Based on the Vernier Effect, I. Ribet, A. Godard, C. Ventalon, ONERA, Palaiseau, FRANCE, Christian Simonneau, CNRS/CNET, Bagneux Cedex, FRANCE, Emmanuel Rosencher, M. Lefebvre, ONERA, Palaiseau, FRANCE
Pulsed single mode operation is demonstrated for the first time using a dual-cavity doubly resonant optical parametric oscillator (DROPO). The mode selection is analysed in terms of the Vernier effect.
 
CThH5 14:30 - 14:45
High Repetition Rate Periodically Poled Lithium Niobate OPO Pumped by a Tunable Ti:Sapphire Laser, Chris Lee, Glenn Baxter, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA, Peter Smith, Graeme Ross, David C. Hanna, University of Southampton, Southampton, UK
We describe a low threshold, periodically poled lithium niobate, optical parametric oscillator pumped by a 1.5 kHz repetition rate, gain-switched, injection-seeded Ti:sapphire laser. 16nm diode laser tuning generated OPO tuning 0.97-1.32 um (signal) and 1.9-4.1 µm (idler).
 
 
CThH6 14:45 - 15:00
Periodically Poled KTiOPO4 For Low-Threshold Parametric Oscillation in the Spectral Region Around 2µm, Valdas Pasiskevicius, H. Karlsson, J. Hellstroem, Fredrik Laurell, Royal Institute of Technology, Stockholm, SWEDEN, I. Freitag, InnoLight GmbH, Hannover, GERMANY
OPO thresholds of around 10µJ are demonstrated in PPKTP pumped by a single-longitudinal-mode Nd:YAG laser at 1064nm. The output power of 46mW was generated with the 21% efficiency. Spectral and dynamical properties will be discussed.
 
CThH7 15:00 - 15:15
Improvement of Pulsed Optical Parametric Oscillator by Spatio-Temporal Shaping of the Pump Beam, Alain Mugnier, V. Kermene, Alain Barthelemy, IRCOM, Limoges, FRANCE
We propose a new pumping scheme to decrease the oscillation threshold and improve the brightness of nanosecond OPO. The investigated method is based on a spatio-temporal shaping of the pump leading to a kind of self-seeded OPO behavior.
 
 
CThH8 15:15 - 15:30
Self- and Cross-Modulation Effects in a Synchronously Pumped Parametric Oscillator, Eugenijus Gaizauskas, R. Grigonis, Valdas Sirutkaitis, Vilnius University, Vilnius, LITHUANIA
Self- and cross-phase modulation effects on pulse characteristics of synchronously pumped optical parametric oscillator were investigated. Both theory and experiment confirmed that shortened pulses with higher contrast can be generated at presence of mentioned effects.
 
 
16:00 - 17:30
Session: Nonlinear Effects in Novel Systems I
Presider: Ariel Levensen, CNRS/CNET, FRANCE
 
 
CThM1 16:00 - 16:15
Second Harmonic Generation in a Photonic Band Gap Semiconductor Structure, Y. Dumeige, S. Sauvage, I. Sagnes, Petar Vidakovic, Ariel Levenson, CNRS/CNET, Bagneux Cedex, FRANCE, C. Sibilia, Universita di Roma La Sapienza, Rome, ITALY, M. Scalora, US Army Missile & Aviation Command, Redstone Arsenal, AL, USA, M. Centini, Universita di Roma La Sapienza, Rome, ITALY
Second harmonic generation is demonstrated in a 1D photonic band gap structure at 1.55 µm. The structure, which consists of 30 periods of Ga0.7Al0.3As/Ga0.9Al0.1As, is designed to achieve double resonance conditions for the fundamental and the second harmonic.
 
 
CThM2 16:15 - 16:30
Experimental Realization of Generalized Quasi-Periodic Structures for Multiple Nonlinear Interactions, Keren Fradkin-Kashi, Ady Arie, Pavel Urenski, Gil Rosenman, Tel Aviv University, Ramat Aviv, ISRAEL
Simultaneous phase-matching of any two arbitrarily chosen interactions in nonlinear media is achieved using a novel quasi-periodic structure. We experimentally demonstrate efficient frequency doubling of 1064 nm and 1514 nm in quasi-periodically-poled KTiOPO4.
 
 
CThM3 16:30 - 16:45
Continuous, Wide-Band Tuning of a Periodically Poled KTP Optical Parametric Oscillator by Means of a Fan-Shaped Grating, M. Katz, A. Englander, D. Eger, Soreq NRC, Yavne, ISRAEL
A continuously tunable, efficient OPO based on a periodically poled KTP crystal with a wide-angle (4.5°), fan shaped grating is demonstrated. 370 cm-1 (100 nm around 1.67 µm) were covered by a 5 mm scan across the crystal width.
 
 
CThM4 16:45 - 17:00
Cw Blue-Light Second-Harmonic Generation from Ti:Sapphire Pumping in Ion-Implanted Ca4GsO(BO3)3(GdCOB) Waveguides, A. Boudrioua, J.C. Loulergue, Universite de Metz et Supelec, Metz, FRANCE, Paul Moretti, B. Jacquier, Universite Lyon, FRANCE, Gerard Aka, D. Vivien, ENSCP, Paris , FRANCE
Blue laser beams were generated using noncritical-phase-matching He+-implanted calcium gadolinium oxoborate waveguides. Post-annealing procedure improve significantly the conversion efficiency.
 
 
CThM5 17:00 - 17:30 (Invited)
White Light Spectra Generated in Photonic Crystal Fibres, W.J. Wadsworth, University of Bath, Bath, UK, Jonathan Knight, Philip Russell, University of Bath, Bath, UK
Supercontinua generated in photonic crystal fibre give the high signal typical of lasers, single mode, over the bandwidth of a light bulb. We report how parameters such as length, dispersion and power affect the continuum.
 
ROOM 5
 
08:30 - 10:30
Session: Nonlinearities in Glasses and Poled Materials
Presider: Henri Porte, Universite de France Comte, FRANCE
 
CThC1 8:30 - 8:45
Nonlinear Optical Properties of GeS2 Based Glasses at Telecom Wavelengths, K.S. Bindra, Heriot-Watt University, Edinburgh, UK, H. Tookey, A.K. Kar, B.S. Wherrett, Heriot-Watt University, Edinburgh, UK, V.K. Tikhomirov, Animesh Jha, University of Leeds, Leeds, UK
We report measurement of nonlinear refractive index in the multi component GeS2 based glasses with femtosecond pulses at the wavelengths 1.3 and 1.5 micron. The samples do not exhiibit two-photon absorption,due to their large band gaps.
 
 
CThC2 8:45 - 9:00
Frequency Stabilization of a Frequency-Doubled 1556 nm Source to the Two-Photon Transitions of Rubidium, A. Danielli, P. Rusian, Ady Arie, Tel Aviv University, Tel Aviv, ISRAEL
We locked a frequency doubled 1556 nm source directly to the two-photon transitions near 778 nm of rubidium. Second harmonic power exceeding 2mW was obtained by doubling an amplified diode laser in a PPLN channel waveguide.
 
 
CThC3 9:00 - 9:30 (Invited)
Cascaded Non-Linearity and Their Applications, Roland Schiek, Technical University of Munich, Orlando, FL, USA
We present an overview of the experimental progress in using the quadratic cascaded second-order nonlinearity for all-optical switching, self-guiding and routing, pattern formation, pulse compression, mode-locking and frequency shifting.
 
 
CThC4 9:30 - 9:45
Combined Optical Nonlinearities for Travelling-Wave Signal Processing, T. Symul, Kamel Bencheikh, CNRS/CNET, Bagneux, FRANCE, D. Eger, M. Oron, Soreq NRC, Yavne, ISRAEL, Ariel Levenson, CNRS/CNET, Bagneux Cedex, FRANCE
We report on sequential use of a nonlinear phase shift (Kerr-like effect) and a phase sensitive parametric amplification for efficient amplification or inversion of weak optical modulation, and suppression of classical noise.
 
 
CThC5 9:45 - 10:00
Quasi-Phase Matching Conditions Induced by Two-Photon Absorpton in Thermally Poled Glasses, S. Montant, Eric Freysz, Universite Bordeaux 1, Talence Cedex, FRANCE
Quasi-phase matched conditions induced by two-photon absorption in thermally poled glass are reported. The simultaneous formation of a linear non-permanent index grating is also evidenced.
 
 
CThC6 10:00 - 10:15
All-Optical Poling in Chalcohalogenide and Lead-Salt Silicate Glasses, E. Lopez-Lago, V. Couderc, IRCOM, Limoges, FRANCE, L. Griscom, F. Smektala, Universite de Rennes, Rennes, FRANCE, Alain Barthelemy, IRCOM, Limoges, FRANCE
We have performed all-optical poling of a chalcohalogenide glass by the seeding technique. Comparison of the writing/erasing dynamics and induced second-order nonlinearity between the ChHg glass and a lead-salt silicate glass will be reported.
 
 
CThC7 10:15 - 10:30
Observation of a Second-Order Nonlinear Susceptibility in As2S3 Chalcogenide Thin Glass Films, Yves
Quiquempois, Univ. des Sciences & Tech. de Lille, Villeneuve d'Ascq Cedex, FRANCE, A. Villeneuve, Universite Laval, Cite Universitaire, QC, CANADA, D. Dam, Ecole Polytechnique de Montreal, Succ. Centreville, QC, CANADA, K. Turcotte, Universite Laval, Cite Universite, QC, CANADA, J. Maier, George Stegeman, University of Central Florida, Orlando, FL, USA, S. Lacroix, Ecole Polytechnique de Montreal, Quebec, CANADA
The authors report for the first time the observation of a large second-order nonlinear susceptibility in As2S3 chalcogenide glass thin film. Both thermal and optical poling were used. In both cases, x333 is larger than 0.6 pm/V.
 
 
13:30 - 15:30
Session: Lasers in Medicine II
Presider: Stefan Andersson-Engels, Lund Institute of Physics, SWEDEN
 
 
CThI1 13:30 - 14:00 (Invited)
Photodynamic Therapy in the Treatment of Age Related Macular Degeneration. An Update on Currently Ongoing Studies with Verteporfin (TAP/VIP trial), Irene Barbazetto, Luebeck University, Luebeck, GERMANY, U. Schmidt-Erfurth, Luebeck University, Luebeck, GERMANY
Presentation about current status of studies (TAP/VIP trial) using Photodynamic therapy with Verteporfin in the treatment of subfoveal, choroidal neovascularization secondary to age related macular degeneration or pathologic myopia.
 
CThI2 14:00 - 14:30 (Invited)
Fluorescence Lifetime Imaging for Biomedicine and Spectroscopy, M.J. Cole, Jan Siegel, S.E.D. Webb, Yan Gu, R. Jones, K. Dowling, D. Parsons-Karavassilis, Paul French, M.J. Lever, Imperial College, London, UK, L.O.D. Sucharov, M.A.A. Neil, R. Juskaitis, Tony Wilson, University of Oxford, Oxford, UK
We describe a 2-D fluorescence lifetime imaging (FLIM) instrument based on ultrafast solid-state laser technology that can provide chemically specific functional/diagnostic 2-D and 3-D imaging. It has been applied to autofluorescence of biological tissue.
 
CThI3 14:30 - 14:45
Laser-Induced Endogenous Fluorescence as Possible Response Predicator of Neoadjuvant Treatment of Rectal Cancer, Bernd Ebert, Uwe Sukowski, Herbert Rinneberg, Physikalisch-Technische Bundesanstalt, Berlin, GERMANY, P. Balanou, K. Thomas Moesta, T. Handke, B. Rau Peter Schlag, Robert-Roessle-Klinik, Berlin, GERMANY,
Preoperative radiochemotherapy alone or combined with hyperthermia can increase resectability of regionally advanced rectal cancer. Recording time-gated laser-induced autofluorescence in vivo before and after such therapy we observed a decrease of fluorescence of endogenous protoporphyrin IX.
CThI4 14:45 - 15:00
Spontaneous Emission Control with Planar and Corrugated Dielectric Structures for Ultrasensitive Fluorescence Analysis in the Life Sciences, Cedric Begon, Fabien Lemarchand, Herve Rigneault, ENSPM, Marseille Cedex 20, FRANCE, John Rarity, DERA, UK
We investigate the ability of photonic structures, such as planar microcavities and diffraction gratings, to exert spontaneous emission control on biological fluorophores in order to condense the emitted light into particular directions.
 
CThI5 15:00 - 15:15
Random Lasing After Two-Photon Excitation, Giannis Zacharakis, George Filippidis, Theodore G. Papazoglou, FO.R.T.H. - I.E.S.L., Heraklion, Crete, GREECE, Alexander Pravdin, Svetlana Chernova, Valery Tuchin, Saratov State University, Saratov, RUSSIA
Random lasing with two-photon excitation was observed for the first time, in both scattering and amplifying gelatin samples. Pumping was performed with subpicosecond laser pulses at 800 nm and the emission, at 450 nm, was observed with a spectrograph streak camera detection system.
 
 
CThI6 15:15 - 15:30
Time Resolved Reading of DNA Microarray by an Intensified CCD Camera, Rinaldo Cubeddu, Cosimo D'Andrea, Antonio Pifferi, Paoloa Taroni, Alessandro Torricelli, Gianluca Valentini, Politecnico di Milano, Milano, ITALY, C. Battaglia, C. Consolandi, L. Rossi-Bernardi, G. Salani, Universita degli Studi di Milano, Segrate Milano, ITALY
In the present paper we describe a novel approach for DNA microarray reading. We used an intensified CCD camera with picosecond time resolution either for single shot image acquisitions or for time resolved measurements.
 
16:00 - 18:00
Session: Lasers in Medicine III
Presider: Antonio Pifferi, Politecnico di Milano, ITALY
 
 
CThN1 16:00 - 16:15
Non-Invasive Burn Depth Determination by Diffuse Reflectance Measurement of Intensity Modulated Light, Lars Svaasand, Thorsten Spott, Norwegian University of Sci & Tech, Trondheim, NORWAY, Tuan Pham, Lund Institute of Technology, Lund, SWEDEN, Bruce Tromberg, Beckman Laser Institute & Medical Clinic, Irvine, CA, USA
The depth of a burn injury may be assessed by measuring the diffuse reflectance of intensity modulated light. The technique is based on a diffusion model that describes the interference of diffuse photondensity waves in plane layered media.
 
 
CThN2 16:15 - 16:30
The Use of a Non-Contact Fourier Interferometric, Hyperspectral Imaging System to Quantify the Absorption and Reduced Scattering Coefficients of Tissue-Like Turbid Media Over a Broad Spectral Range, Tuan Pham, Lund Institute of Technology, Lund, SWEDEN, Frederic Bevilacqua, Beckman Laser Institute & Medical Clinic, Irvine, CA, USA, Thorsten Spott, Norwegian University of Sci & Tech, Trondheim, NORWAY, Jan Dam, Bang & Olufsen Medicom a/s, Struer, DENMARK, Bruce Tromberg, Beckman Laser Institute & Medical Clinic, Irvine, CA, USA, Stefan Andersson Engels, Lund Institute of Physics, SWEDEN
Absorption (µa) and reduced scattering (µs) spectra of turbid media was quantified with an accuracy of ±7% and ±3%, respectively, using a non-contact imaging approach based on a Fourier transform interferometric imaging system.
 
 
CThN3 16:30 - 16:45
Optical Properties of Flowing Bovine Blood in vitro, Johannes Swartling, Prakasa Aruna, Lund Institute of Technology, Lund, SWEDEN, Annika Enejder, Gambro Lundia AB, Lund, SWEDEN, Stefan Andersson-Engels, Lund Institute of Physics, Lund, SWEDEN
The absorption and scattering in flowing bovine blood were studied using an optically integrating sphere set-up. Both show a decrease with higher blood flow rates. Linearly polarized light experiments show a dependence in the optical properities on the angle of polarisation.
 
CThN4 16:45 - 17:00
Oxygen Saturation in the Brain from Time-Resolved Diffuse Reflectance Measurements, Heidrun Wabnitz, , Jens Steinbrink, Herbert Rinneberg, Physikalisch-Technische Bundesanstalt, Berlin, GERMANY, Hellmuth Obrig, Arno Villringer, Neurologische Klinik, Charite, Berlin, GERMANY
Besides intra- and extracerebral changes in oxy- and deoxyhaemoglobin concentration, estimates of absolute values of blood oxygen saturation in the brain are derived from time-resolved diffuse reflectance measurements.
 
 
CThN5 17:00 - 17:15
Tissues Imaging by Ultrasonic Tagging of Transmitted or Backscattered Photons Paths, Sandrine Leveque-Fort, Juliette Selb, Lionel Pottier, A. Claude Boccara, Ecole Superieure de Phys & Chem Indust, Paris, FRANCE
Acousto-optic imaging allowd to reveal differences of optical properties in biological samples. 3D images have been obtained through 2cm to 3.5 cm thick ex-vivo animal and human tissues. We are improving this technique to couple it with an echograph.
 
CThN6 17:15 - 17:30
Optical Diffusion Imaging Using Nonlinear Multigrid Optimization, Kevin Webb, J.C. Ye, C.A. Bouman, R.P. Millane, Purdue University, West Lafayette, IN, USA
We propse a muligrid solution in a Bayesian framework for optical diffusion tomography which results in improved images and a dramatic reduction in computation time. Tissue model reconstructions support the significance for practical situations.
 
 
CThN7 17:30 - 17:45
Analysis of Gas Dispersed in Scattering Liquids and Solids, Mikael Sjoeholm, Gabriel Somesfalean,Ulf Gustafsson, Stefan Andersson-Engels, Hans Edner, Sune Svanberg, Lund Institute of Technology, Lund, SWEDEN
Monitoring of free gas imbedded in scattering media is suggested employing diode laser spectroscopy combined with sensitive modulation techniques. Model experiments are reported and different applications are discussed.
 
 
CThN8 17:45 - 18:00
Laser Generation of Hard X-Rays and Medical Applications, A. Sjoegren, F. Albert, C.-G. Wahlstroem, Sune Svanberg, C. Olsson, Lund University Hospital, Lund, SWEDEN
Previous work on laser-produced hard x rays from a 10HZ hig-power laser source has been extended to the case of a high-repetition-rate (1kHz) source, X-rays above 30 keV are produced. Medical applications are discussed.
 
 
ROOM 6
 
08:30 - 10:30
Session: Beam Quality and Mode Control
Presider: Vladimir Sherstobitov, Institute for Laser Physics, RUSSIA
 
 
CThD1 8:30 - 8:45
Intracavity Spatial Mode Control of a Diode-Pumped Nd:YAG Laser with an Hologram, J. Bourderionnet, N. Huot, Arnaud Brignon, Jean-Pierre Huignard, Thomson CSF LCR, Orsay, FRANCE
We present a new realization method of phase plate by holographic recording on a photopolymer film. Such a component is implemented in a compat diode pumped Nd:YAG oscillator to control the output spatial beam profile. Flat-top supergaussian and square shape beams are obtained.
 
CThD2 8:45 - 9:00
Modal Control of Solid-State Lasers with Holographic Gratings, Michel Piche, R. Massudi, D. Jeannette, Universite Laval, Cite Universitaire, QC, CANADA
We show how variable reflectivity gratings, when used as output couplers in solid-state lasers, can control the modal content, the spatial shape and the phase curvature of the generated laser beams.
 
 
CThD3 9:00 - 9:15
Stabilization of Broad Area Lasers by Structured Delayed Optical Feedback, S. Wolff, D. Messerschmidt, Henning Fouckhardt, Universitaet Kaiserslautern, Kaiserslautern, GERMANY, C. Simmendinger, Ortwin Hess, DLR - Institute of Technical Physics, Stuttgart, GERMANY
Complementary macroscopic experiments and microscopic simulations are presented showing that structured delayed optical feedback is capable of stabilizing the emission of broad area lasers. A narrow single-lobe farfield is obtained even at elevated pump currents.
 
 
CThD4 9:15 - 9:30
Auto-Aligned Femtosecond Lasers with a SESAM Controlled by Genetic Algorithms, Taro Itatani, Masahiro Murakawa, Yugi Kasai, Hideki Kikkawa, Tetsuya Higuchi, Electrotechnical Laboratory, Ibaraki, JAPAN
We have demonstrated an auto-aligned femtosecond laser with a SESAM controlled by genetic algorithms. This system has been optimized successfully utilizing feedback signals from TPA compared to hill climbing methods which correspond to manual alignments.
 
 
CThD5 9:30 - 10:00 (Invited)
Beam Quality and Coherence Evolution Impulsed Lasers, Claudio Palma, Universita di Roma III, Rome, ITALY
High-gain, short-pulse lasers generate pulses making only a few transits inside the optical cavity. We report on a theoretical and experimental analysis of the transient beam quality and beam parameters at each round-trip.
 
 
CThD6 10:00 - 10:15
Unidirectional Operation in a Dual-Configuration Resonator with Three Nd:YVO4 Rods, Thomas Graf, M. Troebs, J.E. Balmer, Heinz Weber, University of Bern, Bern, SWITZERLAND
A new version of the original variable-configuration resonator is presented that produces purely polarised fundamental-mode output due to unidirectional operation in the ring configuration caused by gain anisotropy in the birefringent laser crystals.
 
 
CThD7 10:15 - 10:30
Active Laser Resonators - Computer Simulation and Practical Realization, Tatiana Cherezova, S.S. Chesnokov, L.N. Kaptsov, Moscow State University, Moscow, RUSSIA, Vadim Samarkin, Alexis Kudryashov, Russian Academy of Sciences, Moscow, RUSSIA
Numerical and experimental results of the formation of the various shaped fundamental modes of stable YAG:Nd3+ and CO2 laser resonator by means of intracavity bimorph deformable mirror are presented.
 
 
13:30 - 15:30
Session: Beam Propagation
Presider: Michel Piche, Université Laval, QC, CANADA
 
 
CThJ1 13:30 - 13:45
Sub-Picosecond UV Laser Pulse Filamentation in Atmosphere, S. Tzortzakis, Ecole Polytechnique - ENSTA, Palaiseau Cedex, FRANCE, S.D. Moustaizis, FO.R.T.H. - I.E.S.L., Heraklion, GREECE, B. Lamouroux, A. Chiron, M. Franco, B. Prade, Andre Mysyrowicz, Ecole Polytechnique - ENSTA, Palaiseau, FRANCE
Filamentation of sub-picosecond UV-laser pulses (248nm, 450fs) with only mJ energy propagating in atmosphere is reported. Spectral broadening, pulse compression and a uniform plasma channel formation are the main attributes of this nonlinear propagation mode.
 
 
CThJ2 13:45 - 14:00
Femtosecond Interference Effects Generated by Refractive Thin-Film Micro-Optics, R. Grunwald, Uwe Griebner, F. Tschirschwitz, E.T.J. Nibbering, T. Elsaesser, Max-Born-Institute, Berlin, GERMANY, V. Kebbel, Bremen Institute of Applied Beam Tech, Bremen, GERMANY
Micro-optical thin-film array components have been used to generate interference effects with ultrashort-pulse lasers. Bessel beams, Talbot patterns and Newtons fringes have been studied. Changes in contrast and spatial frequency spectra indicate spatio-temporal coupling for pulse durations of 12.5... 30 fs.
 
CThJ3 14:00 - 14:15
Microlasers Based on Molecular Sieves, Franco Laeri, U. Vietze, Darmstadt University of Technology, Darmstadt, GERMANY, L. Benmohammadi, Technische Universitaet Darmstadt, Darmstadt, GERMANY, Oe. Weiss, F. Schueth, Max-Planck Institute, Muelheim, GERMANY, I. Braun, D. Woehrle, G. Schulz-Ekloff, Universitaet Bremen, Bremen, GERMANY, J.U. Noeckel, Max-Planck Institute, Muelheim, GERMANY
We discuss the mode structure and the laser threshold as a function of the resonator size and compare the threshold with semiconductor vertical cavity surface emitting lasers.
 
 
CThJ4 14:15 - 14:30
Vectorial Effects in High Numerical Aperture Diffractive Lens, Ram Oron, J.L. Guedalia, Nir Davidson, A.A. Friesem, Weizmann Institute of Science, Rehovot, ISRAEL, Erez Hasman, Technion-Israel
We show theorrtically and experimentally an anomalous behavior, where the encircled energy spot size at the focus of a high numerical aperture diffractive lens reaches a minimum at a numerical aperture of about 0.5 and then increases significantly at higher values.
 
 
CThJ5 14:30 - 15:00 (Invited)
What is the Best Beam for Second Harmonic Generation?, Vittorio Magni, Politecnico di Milano, Milano, ITALY
What beam profile does maximize the second harmonic generation efficiency in bulk nonlinear crystals? Here we answer this question and precisely determine the optimum beam, whose efficiency, however, is only ~2% greater that that of a suitable gaussian beam.
 
 
CThJ6 15:00 - 15:15
Reduction of the Focal Spot Size by Using Polarization Effects, Ralf Dorn, S. Quabis, O. Gloeckl, M. Eberler, Gerd Leuchs, Universitaet Erlangen-Nuernberg, Erlangen, GERMANY
A reduction of the focal spot size by a factor of about two can be achieved by using a radially polarized field distribution. We discuss theoretical and experimental studies of the focal field for different input beams.
 
 
CThJ7 15:15 - 15:30
Noise Dynamics in Actively Mode-Locked Lasers, William Firth, Strathclyde University, Glasgow, Scotland, UK, J.B. Geddes, University of New Hampshire, Durham, NH, USA
The eigen pulses of an actively mode-locked laser model from a bi-orthogonal set. The Petermann factor can get so large that amplified noise destabilises the laser. We analyse, generalise,and re-interpret recent predictions of K rtner et al.
 
 
16:00 - 18:00
Session: Beam Shaping and Mode Control
Presider: Vittorio Magni, Politecnico di Milano, ITALY
 
 
CThO1 16:00 - 16:30 (Invited)
Beam Shaping of High-Power Diode Lasers, Keming Du, M. Baumann, Fraunhofer Institut (IAF), Aachen, GERMANY, A. Luft, Markus Roehner, M. Traub, Fraunhofer Institut fuer Lasertechnik, Aachen, GERMANY
The main advantages of high power diode lasers are their small size, long life, high efficiency and frequency controllability. The major drawbacks of them are the relatively poor beam quality and the strong assymmetry in the beam cross-section and the beam quality. In this paper some examples of beam shaping and multiplexing techniques will be reported.
 
 
CThO2 16:30 - 16:45
Refractive Beam Shaping Elements, Lars-Christian Wittig, M. Cumme, E.-B. Kley, Andreas Tuennermann, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY
Refractive beam shaping elements have the well-known advantages of high efficiency and low wavelength aberration. Using a special design method combined with gray tone lithography we fabricated elements which transform Gaussian intensity distributions into top hat distributions with different lateral shapes.
 
 
CThO3 16:45 - 17:00
Diffractive Optics for High-Power Beam Shaping Applications, Karsten Ballueder, Paul Blair, Paul Rudman, Andrew Waddie, Mohammad Taghizadeh, Heriot-Watt University, Edinburgh, Scotland, UK
We apply novel diffractive optical elements to beam shaping tasks for high-power lasers and material processing applications. New intra-cavity mode selection and external beam-shaping elements are studied.
 
 
CThO4 17:00 - 17:15
Application of Static Phase Control Elements to High Power Solid State Lasers, Tom Bett, A.R. Barnes, AWE plc, Reading, Berks., UK, Mohammad Taghizadeh, Karsten Ballueder, Paul Blair, Andrew Waddie, Heriot-Watt University, Edinburgh, Scotland, UK
The application of phase control elements to high power multi-stage solid state lasers is reported. We describe static phase correction elements to compensate for thermally induced aberrations and pahse elements used to modify the intensity distribution of the laser.
 
 
CThO5 17:15 - 17:30
Demonstration of a Coupled-Cavity Nd:YVO4/Nd:YAG Laser, B.-M. Dicks, H.M. Kretschmann, Klaus Petermann, Guenter Huber, Universitaet Hamburg, Hamburg, GERMANY
A new, simple resonator setup is suggested where a Nd:YAG cystal is inserted between a monolithic Nd:YVO4 laser crystal (microchip) and an external output mirror. First results show more tan 1W of output with 48% slope efficiency and polarized emission.
 
 
CThO6 17:30 - 17:45
Coupled-Cavity Passive Q-Switching, Evgeni Sorokin, Irina Sorokina, Technische Universitaet Wien, Wien, AUSTRIA
Theory of Q-switching of continuously pumped lasers by an absorbing medium in a coupled cavity is presented and veritied experimentally on two laser systems, Nd:YLF with Cr:YAG and Co:MgF2 with Cr:ZnSe.
 
 
CThO7 17:45 - 18:00
Excimer Laser Beam Shaping Using Diffractive Optics, Timo Kajava, M. Kaivola, Helsinki University of Technology, HUT, FINLAND, J. Turunen, P. Paeaekkoenen, M. Kuittinen, J. Simonen, University of Joensuu, Joensuu, FINLAND
We discuss the design and performance of a diffractive flat-top generator. In particular, we show that periodic elements, which are not sensitive to beam-shape distortions or to lateral beam alignment, are suitable for shaping partially-coherent fields.
 
 
ROOM 7
 
08:30 - 10:30
Session: Traps and Cavities for Atoms
Presider: Mark Kasevich, Yale University, CT, USA
 
QThA1 8:30 - 8:45
Evaporative Cooling of Cesium in a Surface Trap, M Hammes, D Rychtarik, V Druzhinina, Rudolf Grimm, Universitaet Heidelberg, Heidelberg, GERMANY
Cesium atoms are evaporatively cooled by ramping down the optical potentials of a gravito-optical surface trap. Resulting temperatures of 300nK and a 100-fold increase in phase-space density represent an encouraging step towards BEC of cesium.
 
 
 
QThA2 8:45 - 9:00
Sensitive Spectrocopy and Atom Dynamics in a Single Beam optical Trap, Nir Friedman, L. Khaykovich, S. Baluschev, R. Ozeri, A. Kaplan, D. Fathi, Nir Davidson, Weizmann Institute of Science, Rehovot, ISRAEL
Ultrasensitive spectroscopy, based on long spin-coherence time of cold atoms in a rotating beam optical trap, and control of the trapped atoms dynamics by changing the trap shape are experimentally demonstrated.
 
 
QThA3 9:00 - 9:15
Echoes in Optical Lattices, F.J.B. Buckremer, R. Dumke, Gerhard Birkl, Wolfgang Ertmer, Universitaet Hannover, Hannover, GERMANY
We experimentally demostrate and systematically study the stimulated revival (echo) of wave packet oscillations in optical lattices. This enables us to obtain information about the decoherence time of the motional wave packets that was previously inaccessible.
 
 
QThA4 9:15 - 9:30
Continuous Loading of a Magnetic Atom Trap, Piet Schmidt, Universitaet Stuttgart, Stuttgart, GERMANY, J. Stuhler, S. Hensler, J. Werner, J. Mylnek, Universitaet Konstanz, Konstanz, GERMANY, T. Pfau, Universitaet Stuttgart, Stuttgart, GERMANY
We continuously load chromium atoms from a magneto-optical trap into a magnetic quadrupole trap. We present measurements on temperature, phase space density and transfer efficiency. Limitations and applications of this new loading scheme are discussed.
 
QThA5 9:30 - 9:45
Mixtures of Lithium and Cesium in a Quasi-Electrostatic Trap, H. Engler, M Mudrich, T. Weber, W. Wohlleben, R. Grimm, M. Weidemueller, Max-Planck Institute, Heidelberg, GERMANY
Lithium and cesium atoms are stored in a quasi-electrostatic optical dipole trap over many minutes. The trap provides excellent starting conditions for the investigation of elastic inter-species interactions and for the formation of cold heteronuclear dimers.
 
QThA6 9:45 - 10:00
Quantum and Classical Solitons with a Two-Component Bose Gas, Peter Drummond, K. Kheruntsyan, M. Bremner, C. Myers, University of Queensland, St. Lucia, Queensland, AUSTRALIA
We analyse the interaction of two-component cold atomic gases, including coherent molecule formation together with s-wave scattering. We obtain both two-particle quantum solitons and high density classical 'super-chemistry' solutions in three dimensional traps.
 
 
QThA7 10:00 - 10:30 (Invited)
Laser Cooling of Strontium Atoms Towards the Quantum Degenerate Regime, Hidetoshi Katori, Japan Science & Technology Corp, Takatsu-ku, Kawasaki, JAPAN, Tetsuya Ido, Yoshitomo Isoya, ERATO, JST, Kawasaki, JAPAN, Makoto Kuwata-Gonokami, University of Tokyo, Tokyo, JAPAN
A narrow-line laser-cooling scheme was developed for strontium atoms to achieve a phase space density of 0.1, which was further increased by applying an evaporative cooling in an optical dipole trap.
 
 
 
13:30 - 15:30
Session: Nanostructures
Presider: Jorn Hvam, Technical University of Denmark, DENMARK
 
 
QThE1 13:30 - 13:45
Bound-Bound Intraband Resonance nad Inhomogeneous Photo-luminescence Broadening in InAs/GaAs Quantum Dots, Carl Pidgeon, P C Findlay, Heriot-Watt University, Edinburgh, UK, Jon-Paul Wells, Felix Free Electron Laser Facility, Nieuwegein, THE NETHERLANDS, Ivan Bradley, Heriot-Watt University, Edinburgh, UK, B.N. Murdin, A.R. Hollingworth, J.A. Barker, University of Surrey, Guildford, UK, S. Malik, R Murray, Imperial College, London, UK
We report optically detected intersublevel resonance measurements of bound-bound intraband resonance and inhomogeneous photoluminescence line broadening in self-assembled InAs/GaAs quantum dots. The transitions are identified, and the line broadening mechanism elucidated.
 
 
QThE2 13:45 - 14:00
Carrier Capture and Recombination Dynamics in Single Pyramidal Quantum Dots, Yann Ducommun, Amo Hartmann, D. Oberli, Eli Kapon, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND
Carrier capture, relaxation and recombination dynamics are experimentally studied on single semiconductor quantum dots embedded in a three-, two- and one- dimensional barrier environment.
 
 
QThE3 14:00 - 14:15
Shaping Metallic Nanostructures and Their Optical Properties Through Irradiation with Short Laser Pulses, Frank Stietz, J. Bosbach, T. Wenzel, T. Vartanyan, F. Traeger, Universitaet Kassel, Kassel, GERMANY
We demonstrate that irradiation of metallic nanostructures with nanosecond laser pulses can be used for narrowing of size distributions, i.e. fabricating monodisperse particles on surfaces, and for generation of structures with well defined, predetermined shape.
 
 
QThE4 14:15 - 14:30
Ultrafast Electron Dynamics in Germanium Nanoparticles, Salvatore Stagira, Mauro Nisoli, Sandro De Silvestri, Politecnico di Milano, Milano, ITALY, A. Stella, P. Tognini, Universita degli Studi di L'Aquila, Pavia, ITALY, P. Cheyssac, R. Kofman, Universite de Nice, Nice Cedex, FRANCE
Electron dynamics in germanium nanoparticles is investigated by femtosecond pump - probe measurements. The intervalley relaxation occurs on a picosecond time scale, while interband relaxation occurs on a sub-150-fs time scale. Band-gap renormalization effects have been analyzed, both experimentally and theoretically.
 
 
QThE5 14:30 - 14:45
Multidimensional Microcavities Incorporating Quantum Wires, Christophe Constanin, E. Martinet, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, Bruno Gayral, France Telecom-CNET, Bagneux Cedex, FRANCE, Jean-Michel Gerard, CNET, Bagneux, FRANCE, Eli
Kapon, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND
Confinement in quantum wires embedded in wavelength size photon wells, wires and boxes is used to increasingly control the emission process in the spectral, spatial and temporal domain. The photon dispersion in the mircocavities of different dimensionality is directly measured.
 
QThE6 14:45 - 15:00
A Novel Tip-Surface Distance Control for low Temperature Scanning Near-Field Photoluminescence Spectroscopy, Andrea Crottini, J. L. Staehli, B. Deveaud, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, Xue-Lun Wang, M. Ogura, Electrotechnical Laboratory, Tsukuba, JAPAN
We present a novel distance control, based on a tuning fork without piezo element, suitable for low temperature photoluminescence. The set-up provides high sensitivity, compactness and several hours stability. Results are shown for semiconducting nanostructures.
 
 
QThE7 15:00 - 15:30 (Invited)
Optical Properties of Semiconductor Quantum Wires and Quantum Dots, Eli Kapon, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND
The self ordering process and the optical and electronic properties of quantum wires and quantum dots grown epitaxially on nonplanar substartes are discussed. Applications of these laterally quantum - confined nanostructures in optoelectronic devices are described.
 
 
16:00 - 18:00
Session: Atom Optics
Presider: Rudolf Grimm, Universitaet Heidleberg, GERMANY
 
 
QThH1 16:00 - 16:30 (Invited)
Cold Atoms, Christophe Salomon, Ecole Normale Superieure, Paris, FRANCE
Abstract not available.
 
QThH2 16:30 - 16:45
Atom Chips, J. Schmiedmayer, R. Folman, D. Cassettari, B. Hessmo, Universitaet Innsbruck, Innsbruck, AUSTRIA, Thomas Maier, Technical University Wien, Wien, AUSTRIA
A large variety of trapping and guiding potentials can be designed by bringing cold atoms close to charged or current carrying structures. This will allow for miniaturization of atoms optical elemets into, matter wave quantum circuits on Atom Chips.
 
QThH3 16:45 - 17:00
Atomic Transport in Integrated Magnetic Microtraps, W. Haensel, J. Reichel, P. Hommelhoff, Max-Planck-Institute f. Quantenoptik, Muechen, GERMANY, Theodor Haensch, University of Munich, Muenchen, GERMANY
We report manipulation of atoms using magnetic fields of microfabricated current-carrying conductors. In particular, we present surface-near transport with the atom motor using undulating wires. This devices also allows splitting and recombining two Ioffe-Prichard Traps.
 
 
QThH4 17:00 - 17:15
Environment-Induced Decoherence in Miniaturized Atom Traps, Carsten Henkel, Martin Wilkens, Universitaet Potsdam, Postdam, GERMANY
In miniaturized traps, atoms are subject to thermal electromagnetic fields whose power spectrum is well above the blackbody level. We discuss simple models and estimate time scales for decoherence and heating.
 
 
QThH5 17:15 - 17:30
High-Resolution Roughness Measurements Using Cold Atom Reflection, V. Savalli, P. Featonby, V. Josse, L. Cognet, D. Stevens, Nathalie Westbrook, C. Westbrook, Alain Aspect, Institut d'Optique, Orsay Cordex, FRANCE
We have used Raman velocity selection on a cold atom cloud to measure the roughness of an atomic mirror at the 0.1nm level.
 
 
QThH6 17:30 - 17:45
Towards a Deterministic Source of Cold Atoms, Daniel Frese, B. Ueberholz, S. Kuhr, W. Alt, D. Schrader, V. Gomer, Dieter Meschede, Bonn University, Bonn, GERMANY
We store countable numbers of atoms in an optical dipole trap with 100% efficiency. Storage times up to 1 min and spin relaxation times of sevreal seconds have been measured.
 
 
ROOM 8
 
08:30 - 10:30
Session: Localized Structures
Presider: Pierre Glorieux, Univ. Des Sciences & Tech de Lille, FRANCE
 
 
QThB1 8:30 - 9:00 (Invited)
Curvature Instability and Localized Structures in Passive Diffractive Resonators, M. Tlidi, A. G. Vladimirov, St. Petersburg State University, St. Petersburg, RUSSIA, Paul Mandel, Universite Libre de Bruxelles, Bruxelles, BELGIUM
We study analytically and numerically the formation of localized structure in a passive ring cavity containig two-level atoms. This analysis reveals the existence of a curvature instability that prevents the stablization of localized structure when the input field exceeds a threshold.
 
 
QThB2 9:00 - 9:15
Localized Structures in a Single-Mirror Feedback System, Burkhard Schaepers, M. Feldmann, Thorsten Ackemann, W. Lange, Westfaelische Wilhems-Universitaet Muenster, Muenster, GERMANY
Localized structures are investigated experimentally and theoretically in a single-mirror feedback system. We demonstrate pinning due to the counteraction of phase and intensity gradients of the light field and the interaction between localized structures.
 
 
QThB3 9:15 - 9:30
From Resting to Moving Localized Structures Due to Symmetry Breaking, Dirk Michaelis, Ulf Peschel, Falk Lederer, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY, Dmitry Skryabin, William Firth, Strathclyde University, Glasgow, Scotland, UK
Symmetry breaking may destabilize resting symmetric localized structures and force their decay into moving asymmetric ones. The bifurcation point is determined by using a stability criterion and an amplitude for the velocity is derived.
 
 
QThB4 9:30 - 9:45
Hexagonal Patterns and Spatial Solitons in a Semiconductor Microresonator, Victor Taranenko, C. Weiss, Physikalisch - Technische Bundesanstalt, Braunschweig, GERMANY
We show experimentally the existence of extended patterns (hexagons) and bright and dark solitons in semiconductor microresonators, of potential usefulness for information processing; qualitatively as predicted recently in numerous theoretical studies.
 
 
QThB5 9:45 - 10:00
Optical Self-Confinement and Waveguiding on Planar Nematic Liquid Crystals, M. Peccianti, A. De Rossi, Gaetano Assanto, Terza University of Rome, Rome, ITALY, A. De Luca, C. Umeton, University of Calabria, Rende, ITALY, Iam Choon Khoo, Pennsylvania State University, University Park, PA, USA
Spatail solutions are formed by an Argon-ion beam in cells containing undoped nematic liquid crystals and subject to an applied voltage.Self-confinement and guidance of a He-Ne probe are demonstrated with mW-powers over mm-length.
 
 
QThB6 10:00 - 10:15
Interaction of Travelling Waves with Counter-Propagating Localised Structures in a LCLV Experiment, Stephen Rankin, Francesco Papoff, Eric Yao, University of Manchester, Manchester, UK
Travelling waves, counter-propagating localised structures and their interaction is investigated experimentally. Applying a lateral shift to the optical feedback and increasing the pump power, waves are first observed and then moving localised structures.
 
 
QThB7 10:15 - 10:30
Removal of Defects in Broad Area Optical Systems, Richard Martin, Graeme Harkness, Gian-Luca Oppo, University of Strathclyde, Glasgow, UK, R. Neubecker, E. Benkler, Technische Universitaet Darmstadt, Darmstadt, GERMANY
Control techniques based on optical feedback of filtered Fourier components are shown to remove and manipulate defects in optical patterns both theoretically and experimentally.
 
 
13:30 - 15:15
Session: Atomic Coherence
Presider: Stephen Barnett, University of Strathclyde, Scotland, UK
 
 
QThF1 13:30 - 13:45
Lasing Without Inversion via Decay Induced Coherence, Olga Kocharovskaya, Andrey Matsko, Yuri Rostovtsev, Marlan Scully, Texas A&M University, College Station, TX, USA
We prove that steady-state lasing without inversion via decay induced coherence in the closed four-level atomic system is possible and it does not require a presence of any coherent driving field. We suggest the way of practical implementation of the scheme via semiconductor quantum dots embedded into a pseudo-photonic band gap structure.
 
 
QThF2 13:45 - 14:00
Quantum Switching Based on the Dark Resonance, Byoung Ham, Electronics and Telecom Res Inst, Daejun, KOREA
A new type of optical switching is presented. The proposed idea of the optical switching is based on the dark resonance interactions and nondegenerate four-wave mixing processes in a four-level system. Both experimental and numerical demonstrations are presented.
 
 
QThF3 14:00 - 14:15
Long Distance Propagation of Resonant Pulses Under Conditions of Induced Transparency, V. G. Arkhipkin, Russian Academy of Sciences, Krasnoyarsk, RUSSIA, I. V. Timofeev, Krasnoyarsk State University, Krasnoyarsks, RUSSIA
The spatial and temporal dunamics of two short laser pulses under conditions of coherent population trapping and adiabatic population transfer is investigated. It is shown that in both cases the probe pulse can penetrate into a medium at a distance of about several thousands of one-photon absorption lengths of a probe pulse.
 
 
QThF4 14:15 - 14:30
Laser Control of Decay Rates in Three-Level Atoms, Olga Kocharovskaya, Texas A&M University, College Station, TX, USA, Y. Radeonychev, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
We show that spontaneous decay rates in three-level atoms can be efficiently controled by coherent laser field and discuss experimental conditions for observation of these effects.
 
 
QThF5 14:30 - 15:00 (Invited)
Atomic Coherence Effects: Past, Present and Future, Marlan Scully, Texas A&M University, College Station, TX, USA
Abstract not available.
 
 
QThF6 15:00 - 15:15
Group Velocity Reduction by Decay-induced Interference, D. Bortman-Arbiv, Bar-Ilan University, Ramat Gan, ISRAEL, A.D. Wilson-Gordon, H. Friedmann, Bar-Ilan University, Ramat Gan, ISRAEL
We exploit decay-induced interference effects in order to manipulate light propagation. The mechanism relies on the step dispersion accompanying the transparency obtained when a single weak probe interacts with a nearly-degenerate V-shaped three-level system.
 
16:00 - 18:15
Session: Nonlinear Optical Phenomena
Presider: William Firth, Strathclyde University, Scotland, UK
QThI1 16:00 - 16:30 (Invited)
Nonlinear Optics with Incoherent Light, M. Katsuragawa, J. Q. Liang, Kohzo Hakuta, University of Electro-Communications, Tokyo, JAPAN
Nonlinear optical process with incoherent light is investigated. We show using solid hydrogen as nonlinear optical medium that adiabatically-prepared Raman-coherence beats with fluorescence light and efficiently replicates the incoherence nature to Raman sidebands.
 
 
QThI2 16:30 - 16:45
Inhibition of Dipolar Radiation in a Momentum Non-Conserving Nonlinear Interaction, Muriel Botey, Jordi Martorell, J Trull, Ramon Vilaseca, Universidad Politecnica de Catalunya, Terrassa, SPAIN
We show that the inhibition of the quadratic nonlinear radiation from a dipole sheet in front of a mirror when the second harmonic field inside is non-vanishing can only be explained including non-conserving momentum terms.
 
 
QThI3 16:45 - 17:00
Phase Relations, Quasi-continuous Spectra and Sub-fs Pulses in Stimulated Raman Scattering, V.P. Kalosha, J. Herrmann, Max-Born-Institute, Berlin, GERMANY
Spectral and temporal characteristics of high order SRS are studied for ps- and sub-ps excitation. A novel Raman line broadening mechanism, the generation of single sub-fs pulses and a method of pulse shortening without external phase control in pump-probe.
 
 
QThI4 17:00 - 17:15
Influence of Walk-Off and Dispersion on the Coherence of Parametric Fluorescence, Antonio Picozzi, CNRS, Nice, FRANCE, Marc Haelterman, Universite Libre de Bruxelles, Brussels, BELGIUM
Considering the problem of parametric fluorescene from a continous pump, we show analytically and numerically that the walk-off between the down converted fields leads to spatio-temporal coherence whereas the dispersion leads to an incoherent dynamics.
 
 
QThI5 17:15 - 17:30
Resonance - Enhanced Third Harmonic Generation in Bessel and Segmented Bessel Beams, V. Peet, S Shchemeljov, University of Tartu, Estonia, GERMANY, W. R. Garrett, University of Tennessee, Knoxville, TN, USA
Resonance-enhanced third harmonic generation in xenon under excitation by Bessel and segmented Bessel beams has been studied and analyzed on the basis of the interference-based cooperative shift of atomic resonance lines. A possibility to control the nonlinear response of a medium in segmented Bessel beams is demonstrated and discussed.
 
 
QThI6 17:30 - 17:45
Observation and Characterization of Inhomogeneous Spectral Broadening of Stimulated Brillouin Scattering in Optical Fibre, Valeri Kovalev, Heriot-Watt University, Edinburgh, UK, Robert Harrison, Heriot-Watt University, Edinburgh, UK
We show the SBS spectrum in optical fibres is inhomogeneous in nature. The effect is attributed to the waveguiding nature of beam propagation in fibre and is generic to parametric interactions of this kind.
 
 
QThI7 17:45 - 18:00
Second-Order Nonlinear Optical Susceptibilites Determined Through Gas-Phase Experiments, Christian Bosshard, ETH Hoenggerberg, Zuerich, SWITZERLAND, Ulrich Gubler, ETH Hoenggerberg, Zurich, SWITZERLAND
We determine absolute values of the second order nonlinear optical susceptibilties at several wavelengths by combining optical third harmonic generation (i) in the gas phase and (ii) in noncentrosymmetric media using casading.
 
 
QThI8 18:00 - 18:15
Wideband Raman Comb Generation Using a High-Q Liquid-Hydrogen Droplet, S. Uetake, R.S.D. Sihombing, T. Mouri, Kohzo Hakuta, University of Electro-Communications, Chofu, Tokyo, JAPAN
Stimulated Raman scattering (SRS) is investigated in a liquid-hydrogen droplet. An extremely high cavity Q-value exceeding 109 is demonstrated. SRS-comb-series covering huge spectral range from deep-ultraviolet to near-infrared is also demonstrated.
 
ROOM 9
 
 
08:30 - 10:30
Session: Entangled Quantum States
Presider: Francesco De Martini, Universita di Roma "La Sapienza", ITALY
 
 
QThC1 8:30 - 8:45
Correlation of Entangled States and Information Theory, Y. Ben-Aryeh, Technion-Israel Institute of Technology, Technion, Haifa, ISRAEL
For entangled two subsystems the maximal Shannon index of correlation is equal half of the quantum index of correlation. Hidden variables theory can increase the Shannon index of correlation so that it will become equal to the quantum index of correlation. The meaning of this result is discussed.
 
 
QThC2 8:45 - 9:00
Single-Photon Entanglement Between Two Modes of the Electromagnetic Field in a Cavity, Patrice Bertet, G. Nogues, Arno Rauschenbeutel, S. Osnaghi, M. Brune, J.-M. Raimond, Serge Haroche, Ecole Normale Superieure, Paris, FRANCE
We have prepared, stored and probed a single-photon entangled state of two field modes with different frequencies in a high-finesse microwave cavity, by sending two successive Rydberg atoms through it.
 
 
 
QThC3 9:00 - 9:15
Temporal Indistinguishability and Quantum Interference, Yoon-Ho Kim, Vincenzo Berardi, Maria Chekova, Augusto Garuccio, Yanhua Shih, University of Maryland, Baltimore, MA, USA
Two temporally distinguishable amplitudes are generated by means of spontaneous parametric down-conversion pumped by two femtosecond laser pulses. When the two amplitudes are made indistinguishable (temporal quantum erasure), interference is observed in coincidences as well as in single counts. Delayed demonstration of temporal quantum erasure in this scheme is also discussed.
 
QThC4 9:15 - 9:30
Complementarity and Which-Path Information, Yoon-Ho Kim, Sergei Kulik, University of Maryland, Baltimore, MD, USA, Hsi-Fu Shih, ITRI/OES, Hsinchu, TAIWAN, R.O.C.
Wave-particle dual behavior of a quantum is said to be complementary. What is the mechanism that enforce complementarity. Our experimental study suggests that complementarity is enforced whether which-path information is given to the quantum at the detection stage.
 
 
QThC5 9:30 - 9:45
Quantum Teleportation of Wavefronts, I. Sokolov, St. Petersburg University, St. Petersburg, RUSSIA, Mikhail Kolobov, Universitaet GH, Essen, GERMANY, Alessandra Gatti, Luigi Lugiato, Universita di Milano, Milano, ITALY
We describe a continuous variable teleportation scheme that allows to teleport with high fidelity the quantum state of a spatially multimode electromagnetic field preserving its quantum correlations in space-time.
 
 
QThC6 9:45 - 10:00
Quantum Incoherence and Entanglement in Cascaded-Crystal Parametric Down-Conversion, Alexander Sergienko, M. Atatuere, Bahaa Saleh, Malvin Teich, Boston University, Boston, MA, USA
We have demonstrated that entangled-photon pairs generated by spontaneous parametric down-conversion from a cascade of two nonlinear crystals, illuminated by a single highly monochromatic laser pump, add incoherently.
 
QThC7 10:00 - 10:15
Quantum Resolution of Geometric Rotations of Polarization, Tedros Tsegaye, J. Soederholm, Royal Institute of Technology, Kista, SWEDEN, Mete Atature, Boston University, Boston, MA, USA, Alexei Trifonov, Gunnar Bjoerk, Royal Institute of Technology, Kista, SWEDEN, Alexander Serienko, Bahaa Saleh, Malvin Teich, Boston University, Boston, MA, USA
We report an experiment utilizing quantum states to increase the measurement resolution of polarization rotation. With N photons, rotations as small as 180°/ (N+1) can be resolved. The states can be considered as polarization eigenstates in quantum theory.
 
 
QThC8 10:15 - 10:30
Analysis of Radiatively Stable Entanglement Generation Between Two Dipole-Interactinr Atoms, I.V. Bargatin, Victor Zadkov, A Grishanin, Moscow State University, Moscow, RUSSIA
The possibilities of creating radiatively stable entangled states of two dipole-interacting three-level atoms in a /\-configuration by means of laser biharmonic continuous driving or pulses are investigated theorectically. We propose three novel methods for generation of entangled states which involve only the lower states of the /\-system, not vulnerable to radiative decay.
 
 
 
13:30 - 15:30
Session: Cavity Quantum Electrodynamics
Presider: H. Walther, Max-Planck-Institut fur Quantenoptic, GERMANY
 
QThG1 13:30 - 14:00 (Invited)
Cavity QED with Trapped Atoms, H.J. Kimble, California Institute of Technology, Pasadena, CA, USA
Cavity QED offers enabling capabilities for diverse tasks in quantum information science (QIS), such as the realization of quantum networks. Critical to the realization of scientific goals in QIS are diverse technical advances, including most importantly the localization of atoms within an optical cavity in a regime of strong coupling. Progress on this front is described, both by way of single-photon trapping and with a far-off resonance dipole-force trap.
 
 
QThG2 14:00 - 14:30 (Invited)
Trapping Single Atoms with Single Photons, Gerhard Rempe, Thomas Fischer, P. Maunz, P. W. H. Pinkse, T. Puppe, Max-Planck-Institute f. Quantenoptik, Garching, GERMANY
A neutral atom is trapped in a single-photon light field of a high-finesse optical cavity. The same field is used to observe the motion of the atom in real time.
 
 
QThG3 14:30 - 14:45
A Hamiltonian for Cavity Decay, S. M. Dutra, G Nienhuis, Leiden University, RA Leiden, THE NETHERLANDS
We derive from first principles the Gardiner-Collett Hamiltonian for high finesse cavity damping and obtain the coupling strength between the discrete cavity quasimodes and the continuum. We generalize this approach to arbitrary finesse.
 
 
QThG4 14:45 - 15:00
Enhancement and Inhibition of Spontaneous Emission in Room-temperature Semiconductor Microcavities with Metallic Mirrors, G. Bourdon, I Robert, R. Adams, K. Nelep, I. Sagnes, J.M. Moison, CNRS/CNET, Bagneax, FRANCE, Izo Abram, CNET, Bagneux, FRANCE
We have fabricated planar semiconductor microcavities with metallic mirrors in which we observed both enhancement and inhibition of the spontaneous emission arising from the band-to-band transitions of a InGaAs quantum well, at room temperature.
 
 
QThG5 15:00 - 15:15
Generation of Fock States in the Micromaser., Ben Varcoe, S. Brattke, H. Walther, Max-Planck-Institute f. Quantenoptik, Garching, GERMANY
The one atom maser or micromaser allows one to study the resonant interaction of a single atom with a single mode of a superconducting cavity. In this paper we present the first generation of Fock states using the micromaser. The Fock states were realised in two ways, firstly in the steady state by using the trapping state condition, and secondly using state reduction of a pumping atom. In the second case the purity of the prepared Fock state was investigated by sending an additional probe atom into the cavity.
 
 
QThG6 15:15 - 15:30
Observation of Cavity-Mediated Long-Range Light Forces Between Strongly Coupled Atoms, Thomas Fischer, P. Maunz, P. W. H. Pinkse, T. Puppe, Gerhard Rempe, Max-Planck-Institute f. Quantenoptik, Garching, GERMANY
We report on the observation of long-range forces between ultracold rubidium atoms that are mutually coupled by the field of a weakly driven high-finesse optical cavity.
 
 
16:00 - 18:00
Session: Quantum Information
Presider: Gerd Leuchs, Universitaet Erlangen-Nuernberg, GERMANY
 
 
QThJ1 16:00 - 16:30 (Invited)
Quantum Computing with Quantum Optical Systems, Peter Zoller, Universitaet Innsbruck, Innsbruck, AUSTRIA
We present quantum optical systems that implement quantum computing tasks concentrating on two-qubit gates. We investigate two novel schemes, based on (i) dipole moments of (neutral) Rydberg atoms and, (ii) on conditional Coulomb interactions between ions in arrays of micro-traps.
 
 
QThJ2 16:30 - 17:00 (Invited)
Ground State Cooling, Quantum State Engineering and Study of Decoherence of Ions in Paul Traps, Ferdinand Schmidt-Kaler, C Roos, H Rohde, S Gulde, A. B. Mundt, D Leibfried, Juergen Eschner, R. Blatt, Universitaet Innsbruck, Innsbruck, AUSTRIA
Calcium ions in Paul traps were cooled to the vibrational ground state and nonclassical motional states have been prepared. The time constant for motional heating is much smaller than the coherence time for state manipulation.
 
 
QThJ3 17:00 - 17:15
Storage and Processing of Quantum Light, Lu-Ming Duan, J. Cirac, Peter Zoller, Universitaet Innsbruck, Innsbruck, AUSTRIA
We describe an experimentally feasible scheme: I) to store an arbitrary unknown state of the light pulse with an arbitrary shape; ii) to modulate the pulse shape of light; iii) and to act as a pulse shape splitter.
 
 
QThJ4 17:15 - 17:30
Quantum Solitons of the Nonlinear Schroedinger Equations and Their Quantum Noise, R. K. Bullough, UMIST, Manchester, UK, N. M. Bogoliubov, Steklov Mathematical Institute, St. Petersburg, RUSSIA, J. T. Timonen, University of Jyvaeskylae, Jyvaeskylae, FINLAND
Natural 'quantum solitons' of the quantum Nonlinear Schrödinger equation are off diagonal matrix elements between n-particle states. No quantum noise can derive from fluctuations in particle number in these 'quantum solitons' transmitting in a fibre.
 
QThJ5 17:30 - 17:45
Optimal Discrimination Between Overcomplete States, Roger Clarke, Viv Kendon, Erling Riis, S. Barnett, University of Strathclyde, Glasgow, Scotland, UK, A. Chefles, University of Herefordshire, Hatfield, UK
Symmetric sets of three (trine) and four (tetrad) states are distinguished with either minimum error ot maximum mutual information, as an example of the experimental realisation of state discrimination.
 
 
QThJ6 17:45 - 18:00
Highly Efficient Bell State Measurement with Multi-photon Counters, Shigeki Takeuchi, Hokkaido University, Kita-ku, Sapporo, Hokkaido, JAPAN
Bell state measurement with high-quantum efficency is demonstrated with special detectors which distinguish two-photon incidence from single-photon incidence with high efficiency. This scheme is useful for quantum cryptography and detection loophole-free Bell's test.
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