Tuesday, 3 May 2011 - CLEO

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Room 315 Room 316 Room 317 CLEO: Science & Innovations JOINT CTuH • Ultrafast Measurement Techniques—Continued CTuI • CW Fiber Sources— Continued JTuD • Joint Symposium on Semiconductor Ultraviolet LEDs and Lasers: Semiconductor Mid- UV LEDs and Lasers—Continued CTuH4 • 12:00 3-Dimensional Laser Pulse Intensity Diagnostics for the Energy Recovery Linac Photoinjector, Heng Li 1 , Ivan Bazarov 1 , Bruce Dunhan 1 , Frank Wise 2 ; 1 Physics Department, Cornell Univ., USA; 2 Department of Applide Physics, Cornell Univ., USA. We demonstrate measurement of spatiotemporal intensity profiles with spatial resolution of 20 µm and temporal resolution of 130 fs. Measurements of stacked soliton pulses and the output of a dissipative soliton laser illustrate the capability. CTuI5 • 12:00 High Resolution Tunable Fiber Laser Employing Two-Dimensional Dispersion and a Phase LCoS Modulator, David Sinefeld 1 , Dan M. Marom 1 ; 1 Applied Physics, Hebrew Univ. of Jerusalem, Israel. We propose and demonstrate a tunable fiber laser based on a 2D-dispersion arrangement by crossing a 100GHz WGR and a 1200gr/mm bulk grating. We address specific spectral lines with less than 200 MHz. JTuD3 • 12:00 Growth and characterization of deep ultraviolet emitting AlGaN structures on SiC substrates, Wei Zhang 1 , Alexey Nikiforov 1 , Christos Thomidis 1 , Adam Moldawer 1 , Haiding Sun 1 , William Hug 2 , Theodore Moustakas 1 ; 1 Boston Univ., USA; 2 Photon Systems, Inc., USA. We report MBE growth of AlGaN structures emitting below 250 nm on SiC substrates. We found that the IQE of the MQWs and DHs is as high as 68% and 43% respectively. CTuH5 • 12:15 A Terahertz Streak Camera for the Characterization of Ultrashort Laser Pulses, Olaf Schubert 1,2 , Friederike Junginger 1 , Claudius Riek 1 , Alexander Sell 1 , Alfred Leitenstorfer 1 , Rupert Huber 1,2 ; 1 Department of Physics and Center for Applied Photonics, Univ. of Konstanz, Germany; 2 Current address: Department of Physics, Univ. of Regensburg, Germany. We demonstrate a technique for the characterization of ultrabroadband and low-intensity laser pulses using spectrally resolved THz polarization streaking. Our method yields the spectral amplitude and phase without resorting to complex algorithms. CTuI6 • 12:15 Brillouin Fiber Laser with Incoherent Feedback, Andrei Fotiadi 1,2 , Elena Preda 1 , Patrice Mégret 1 ; 1 UMONS, Belgium; 2 Ioffe Inst. of RAS, Russian Federation. We report on all-fiber Brillouin fiber laser utilizing feedback caused by Rayleigh scattering in a telecom fiber instead of one cavity mirror. The results of the experimental measurements are in a perfect agreement with the theoretical predictions. JTuD4 • 12:15 High TE-Polarized Optical Gain from AlGaN- Delta-GaN Quantum Well for Deep UV Lasers, Jing Zhang 1 , Hongping Zhao 1 , Nelson Tansu 1 ; 1 Department of Electrical and Computer Engineering, Lehigh Univ., USA. The use of ultra-thin GaN delta-layer in high Al-content AlGaN quantum wells leads to the strong valence subbands rearrangement, which in turn results in high TE-polarized optical gain at emission wavelength ~250-300 nm. CTuH6 • 12:30 One Million Time-Bandwidth Product Full- Field Waveform Measurement using Frequencyto-Time Interferometry, Nicolas K. Fontaine 1 , Ryan P. Scott 1 , David J. Geisler 1 , Tingting He 1 , Jonathan P. Heritage 1 , S. J. Ben Yoo 1 ; 1 Electrical and Computer Engineering, Univ. of California, Davis, USA. Time-multiplexing of a single-shot interferometric measurement technique using frequency-to-time mapping and digital coherent detection characterizes the amplitude and phase of 350-GHz bandwidth waveforms with a 3-µs record length in only 113 µs. CTuI7 • 12:30 Ce 3+ ,Sm 3+ :YAG Double-clad Crystal Fiber Broadband Light Source, Yen-Sheng Lin 1 , Dong-Yo Jheng 1 , Kuang-Yu Hsu 1 , Cheng-Nan Tsai 2 , Sheng-Lung Huang 1,3 ; 1 Inst. of Photonics and Optoelectronics, National Taiwan Univ., Taiwan; 2 Department of Electronics Engineering, Cheng Shiu Univ., Taiwan; 3 Department of Electrical Engineering, National Taiwan Univ., Taiwan. Nine millwatts of broadband emission were generated from a Ce,Sm:YAG double-clad crystal fiber. This direct diode-laser pumped visible light had a 3-dB bandwidth of 100 nm and an optical-to-optical conversion efficiency of 2.4%. JTuD5 • 12:30 New generation of Distributed Bragg Reflectors based on BAlN/AlN structures for deep UV-optoelectronic applications, Mohamed Abid 1 , Tarik Moudakir 2 , Simon Gautier 3 , Gaëlle Orsal 3 , Aotmane En Naciri 4 , Zakaria Djebbour 5,6 , Jae-Hyun Ryou 7 , Gilles Patriarche 8 , Hee Jin Kim 7 , Zac Lochner 7 , Konstantinos Pantzas 1 , David Alamarguy 5 , François Jomard 9 , Russel Dupuis 7 , Abdallah Ougazzaden 1 ; 1 Georgia Inst. of Technology / GT-Lorraine-UMI 2958 Georgia Tech-CNRS, France; 2 Supélec / UMI 2958 Georgia Tech-CNRS, France; 3 Lab Matériaux Optiques, Photonique et Système (LMOPS), EA 4423, Université Paul Verlaine et Supélec / UMI 2958 Georgia Tech-CNRS, France; 4 Laboratoire de Physique des Milieux Denses (LPMD), Univ. Paul Verlaine-Metz, France; 5 Lab de Génie Electrique de Paris (LGEP), UMR 8507 CNRS, Supélec, Univ. Paris-Sud 11, Univ. Pierre et Marie Curie, France; 6 Dept. of Physics and Engineering Science, Univ. of Versailles (UVSQ), France; 7 Ctr. for Compound Semiconductors and School of Electrical and Computer Engineering, Georgia Inst. of Technology, USA; 8 LPN CNRS, UPR, France; 9 Laboratoire de Physique des solides et de Crisallogénèse (LPSC), UMR 8635 CNRS, Univ. of Versailles-Saint-Quentin1, France. We report innovative highly reflective DBR structures based on the novel material BAlN. We report innovative highly reflective DBR structures based on the novel material BAlN. An experimental BAlN/AlN DBRs demonstrated a reflectivity of 60% and 82% at wavelengths of 282 nm and 311nm respectively. Tuesday, 3 May 10:30–12:30 Market Focus: Sensors & Lasers for Defense and Security, Exhibit Hall F, 100 Level 12:45–13:45 Lunch Break (concessions available in Exhibit Halls E and F, 100 Level) Concurrent sessions are grouped across four pages. Please review all four pages for complete session information. 101
Room 327 Room 336 Room 337 Room 338 CLEO: Science & Innovations JOINT CLEO: QELS- Fundamental Science CLEO: Science & Innovations CTuJ • Petawatt Laser Technology—Continued JTuE • Lasers in Environmental Sensing—Continued QTuG • Invisibility and Absorbers—Continued CTuK • Optical Parametric Oscillators—Continued CTuJ4 • 12:00 High-Power Faraday Isolator with New Method of Compensation of Thermally Induced Depolarization, Ilya L. Snetkov 1 , Oleg Palashov 1 , Efim Khazanov 1 ; 1 Inst. of Applied Physics of RAS, Russian Federation. A new compensation scheme of thermodepolarization in Faraday isolators was predicted and experimentally verified. Scheme allows creating a new Faraday isolator for high power lasers and upgrades traditional ones, increasing their isolation ratio CTuJ5 • 12:15 Spectral Amplitude and Phase Evolution in Petawatt Laser Pulses, Catalin V. Filip 1 ; 1 Lawrence Livermore National Lab, USA. The influence of the active gain medium on the spectral amplitude and phase of amplified pulses in a CPA system is studied. Results from a 10-PW example based on Nd-doped mixed glasses are presented. JTuE5 • 12:00 Signal to Noise Ratios of Pulsed and Sinewave Modulated Direct Detection Lidar for IPDA Measurements, Xiaoli Sun 1 , James B. Abshire 1 ; 1 NASA GSFC, USA. The signal-to-noise ratios have been derived for IPDA lidar using a direct detection receiver for both pulsed and sinewave laser modulation techniques, and the results and Lab measurements are presented. JTuE6 • 12:15 Selective gas sensing for photonic crystal lasers, Cameron L. Smith 1 , Johan U. Lind 1 , Claus H. Nielsen 1 , Mads B. Christiansen 1 , Thomas Buss 1 , Niels B. Larsen 1 , Anders Kristensen 1 ; 1 DTU Nanotech, Denmark. We facilitate photonic crystal lasers to sense gases via an additional swelling polymer film. We describe the transduction transfer function and experimentally demonstrate an enhanced ethanol vapor sensitivity over 15 dB with low humidity crosstalk. QTuG5 • 12:00 Invited Three-dimensional invisibility carpet cloak at 700 nm wavelength, Tolga Ergin 1 , Joachim Fischer 1 , Martin Wegener 1 ; 1 Inst. for Applied Physics,DFG-Center for Functional Nanostructures (CFN), and Institut für Nanotechnologie, Karlsruhe Inst. of Technology, Germany. We present a threedimensional carpet cloak composed of a 350-nm rod-spacing woodpile photonic crystal with tailored local volume filling fraction. Microscope images under monochromatic illumination reveal excellent cloaking at 700 nm wavelength. CTuK5 • 12:00 Widely tunable narrow-band terahertz-wave source pumped by injection-seeded optical parametric generation, Kouji Nawata 1 , Ming Tang 1 , Takashi Notake 1 , Yuye Wang 1 , Hiromasa Ito 1 , Hiroaki Minamide 1 ; 1 RIKEN, Japan. We proposed a novel widely tunable terahertz-wave source pumped by injection-seeded KTP optical parametric generator. Efficient narrowing of linewidth and high output of the pump source were obtained to 50GHz and 273uJ respectively. CTuK6 • 12:15 500-GHz Mode-Hop-Free Idler Tuning range with a Frequency-Stabilized Singly-Resonant Parametric Oscillator, Jean-Jacques Zondy 1 , Emeline Andrieux 1 , Abdallah Rihan 1 , Thomas Zanon-Willette 1 , Malo Cadoret 1 ; 1 LCM, LNE- CNAM, France. A cw signal-resonant optical parametric oscillator is frequency stabilized at the kilohertz jitter level to the transmission peak of an external high finesse Fabry-Perot cavity, allowing a widely tunable mode-hop-free idler scan over 500 GHz. Tuesday, 3 May CTuJ6 • 12:30 Origin of the Coherent Contrast Pedestal in Petawatt Laser Pulses, Chris Hooker 1 , Yunxin Tang 1 , Oleg Chekhlov 1 , John L. Collier 1 , Edwin Divall 1 , Klaus Ertel 1 , Steve Hawkes 1 , Rajeev Pattathil 1 ; 1 Central Laser Facility, Rutherford Appleton Lab, UK. We demonstrate experimentally that the “coherent” contrast pedestal in compressed pulses from CPA lasers originates from the diffraction gratings in the pulse stretcher. The pedestal intensity correlates with the level of scatter from the gratings. JTuE7 • 12:30 Temperature Dependence of Gas-Detection Sensitivity of InGaAsSb/AlGaAsSb DFB lasers, Brian Ventrudo 1 , Craig Storey 1 , James A. Gupta 1 , Andrew Bezinger 1 ; 1 Inst. for Microstructural Sciences, National Research Council of Canada, Canada. Detection sensitivity of
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Tuesday, 3 May 2011 - CLEO

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