| Negative Refraction in the Optical Range and Left-Handed Photonics |
19-Jul-2009 |
11 pages |
| Authors:
Vladimir M Shalaev; PURDUE UNIV LAFAYETTE IN
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 | In this project, we were concerned primarily with studying the physical phenomena, devices and designs related to negative refraction in the optical frequency range. We used theoretical work, computer simulations, and experimental studies to further the understanding of negative refraction in the high sought-after optical range. Our work has brought a number of significant advances, including experimental demonstrations of negative refraction well into the visible range to advanced designs in ... |
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| Optical Pulse Interactions in Nonlinear Excited State Materials |
14-Jul-2008 |
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| Authors:
Mary Potasek; David McLaughlin; Evgueni Parilov; NEW YORK UNIV NY COURANT INST OF MATHEMATICAL SCIENCES
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 | We cover five general areas: (1) optical limiting (2) organic multiphoton absorber (AFX) (3) numerical methods (4) relationship between the building blocks/decay rate matrix and the coupled propagation/rate equations and (5) semiconductor quantum dots. |
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| Stimulated Brillouin Scattering Phase Conjugation in Fiber Optic Waveguides |
01-Jul-2008 |
199 pages |
| Authors:
Steven M Massey; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The objective of this research effort was to demonstrate the path to continuous wave, coherent beam combination through stimulated Brillouin scattering phase conjugation in optical fiber. This work experimentally determined the fiber parameters necessary for phase conjugation in step-index optical fiber. Continuous wave phase conjugation using stimulated Brillouin scattering in step-index fibers was achieved for the first time with a fidelity of 0.8 and a threshold power of 16 W ... |
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| Characterization of Periodically Poled Nonlinear Materials Using Digital Image Processing |
01-Apr-2008 |
51 pages |
| Authors:
James R Alverson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH ELECTRO OPTICAL COUNTERMEASURES
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| For as long as periodically poled devices have been produced, there has been a need to evaluate and improve their performance. A new approach based on image processing across an entire z+ or z- surface of a poled crystal allows for better quantification of the underlying domain structure and directly relates to device performance. The poled regions are determined from the images and this mapping is then used to determine ... |
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| Modeling of SBS Phase Conjugation in Multimode Step Index Fibers |
01-Mar-2008 |
106 pages |
| Authors:
Justin B Spring; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Stimulated Brillouin scattering in a multimode step-index fiber can be used to generate a counter-propagating, phase-conjugate beam that would prove useful in applications such as near diffraction limited, double-pass high-power amplifiers or coherent beam combination. Little modeling of such a fiber-based phase-conjugator has been done, making it difficult to make decisions about the right fiber to use. A numerical model was constructed with the aim of providing educated predictions about ... |
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| Sub-Nanosecond Infrared Optical Parametric Pulse Generation in Periodically Poled Lithium Niobate Pumped by a Seeded Fiber Amplifier |
FEB 2008 |
92 pages |
| Authors:
Matthew D. Cocuzzi; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH ELECTRO OPTICAL COUNTERMEASURES
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| A ytterbium-doped, polarization maintaining PM double-clad fiber was seeded at one end and pumped at the other end, using dichroic filters to protect the pump and seed lasers, creating a fiber amplifier. The seed laser was a passively Q-switched Nd:YAG microchip laser operating at 1064 nm, polarized 99:1, 7.14 kHz repetition rare, 0.5 nsec pulse width, average power of 38 mW, and 5.3 microjoule pulse energy. The pump laser was ... |
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| Quantum Computing and Control by Optical Manipulation of Molecular Coherences: Towards Scalability |
14 SEP 2007 |
12 pages |
| Authors:
V. A. Apkarian; CALIFORNIA UNIV IRVINE DEPT OF CHEMISTRY
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| Principles of quantum computing using molecular vibronic states and time-frequency resolved coherent anti-stokes Raman scattering (TFRCARS) were demonstrated through, and the execution of standard algorithms were elaborated along with measures of fidelity. These proof-of-principle implementations are on ensembles of molecules in the gas phase, unlikely to be a realistic architecture in practical implementations. We have therefore focused on solid-state implementations of the same, where now the understanding and control of ... |
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| Correlated Photon-Pair Generation in Reverse Proton-Exchange PPLN Waveguides With Integrated Mode Demultiplexer at 10 GHz Clock |
31-Jul-2007 |
7 pages |
| Authors:
Yoshihisa Yamamoto; Qiang Zhang; M M Fejer; Xiuping Xie; Hiroki Takesue; Sae W Nam; Carsten Langrock; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
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| We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5-micron and a clock of 10 GHz. Using superconducting single photon detectors, we observed a coincidence to accidental count ratio (CAR) as high as 4000. The developed photon-pair source may find broad application in quantum information systems as well as quantum entanglement experiments. |
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| Analysis of an Optical Channelization Technique for Microwave Applications |
27 JUN 2007 |
20 pages |
| Authors:
Matthew S. Rogge; Vincent J. Urick; Frank Bucholtz; NAVAL RESEARCH LAB WASHINGTON DC OPTICAL SCIENCES DIV
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| Increasing electrical bandwidth combined with improved optical filtering allow for a new class of optical channelizers for use in radiofrequency, microwave, and millimeter-wave applications. After a brief review of existing channelization technology, an optical channelizer that uses optical local oscillators and optical filters is analyzed. Linearity and other limitations of the scheme show a strong dependence on the linearity of the optical modulator. The optical modulator is explored in both ... |
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| Increased Cross-Correlation in Cascaded Four-Wave Mixing Processes |
11 JUN 2007 |
8 pages |
| Authors:
Jingyun Fan; Alan L. Migdall; L. J. Wang; NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD
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| We report the measurement of increased noise cross-correlation between stokes and anti-stokes beams created in cascaded four-wave mixing processes with dual pump wavelengths. This method may be useful in creating highly correlated twin beams for various applications including quantum information processing. |
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| Simulation Methods for Rare Events in Nonlinear Lightwave Systems |
31 MAY 2007 |
6 pages |
| Authors:
William L. Kath; NORTHWESTERN UNIV EVANSTON IL SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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| The objectives of this project were to develop new hybrid analytical/computational methods that are capable of simulating the rare events that are the determining factors of the performance of lightwave systems and devices. These methods use the following: (1) analytical techniques, such as perturbation and asymptotic methods, to guide numerical simulations using importance sampling; and (2) adaptive numerical methods, such as the multicanonical Monte Carlo and cross-entropy methods, to perform ... |
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| A Broadband High Spectral Brightness Fiber Based Two-Photon Source |
19 MAR 2007 |
8 pages |
| Authors:
Jingyun Fan; Alan L. Migdall; NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD
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| After characterizing the Raman scattering in a fused silica polarization-maintaining microstructure optical fiber, we built a fiber-based two-photon light source of high spectral brightness, broad spectral range, and very low noise background at room temperature. The resulting bright low-noise two-photon light can be used for a number of quantum information applications. |
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| Stimulated Brillouin Scattering Beam Cleanup and Beam Phasing Through Two Passive Channels |
MAR 2007 |
65 pages |
| Authors:
Omar Gamboa; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Stimulated Brillouin scattering (SBS) beam cleanup and SBS piston correction properties are explored. This research measures the beam cleaning and phase-conjugating properties of stimulated Brillouin scattering in an optical fiber. The first stage of this research began by coupling an aberrated beam into a long multimode 62.5 micron core fiber to demonstrate its beam cleanup properties. The Stokes beam obtained was shown to be the fundamental fiber mode, LP01. The ... |
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| Optical Parametric Oscillation in Orientation-Patterned Gallium Arsenide |
MAR 2007 |
43 pages |
| Authors:
Scott A. Shell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Tunable laser sources in the mid-infrared (MIR) spectral range are required for several Air Force applications. Existing lasers with output in the near-infrared can be converted to more desirable MIR by using nonlinear effects. Orientation patterned gallium arsenide (OPGaAs) is a promising nonlinear conversion material because it has broad transparency and can be engineered for specific pump laser and output wavelengths using quasi-phase matching techniques. This research examines optical parametric ... |
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| Theory of Second Harmonic Generation in Presence of Diffraction, Beam Walk-Off and Pump Depletion (Preprint) |
MAR 2007 |
16 pages |
| Authors:
Shekhar Guha; Leonel P. Gonzalez; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| Integral expressions for the pump and generated fields are presented here for the case of second harmonic generation of a focused Gaussian pump beam incident on a nonlinear crystal. The birefringent walk-off of the generated beam and the effect of pump depletion are included in the theory. |
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| Efficient THz Source Based on Cascaded Optical Down-Conversion in Orientation-Patterned GaAs Structures |
29 DEC 2006 |
32 pages |
| Authors:
M. M. Fejer; K. Vodopyanov; R. Route; J. Schaar; P. Kuo; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
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| The goal of this TIFT I-A program was to demonstrate an efficient room temperature source for THz imaging systems based on optical down-conversion in an orientation-patterned GaAs microstructure, incorporated into a resonant cavity, and pumped by a compact solid-state laser. Research was focused on (1) fabrication of quasi-phase-matched (QPM) GaAs microstructures with periodic reversal of crystalline orientation, including orientation-patterned GaAs (OP-GaAs), diffusion-bonded GaAs (DB-GaAs) and optically-contacted GaAs (OC-GaAs), (2) producing ... |
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| Spin-Based Photonics via Electromagnetically Induced Transparency |
NOV 2006 |
4 pages |
| Authors:
Hailin Wang; J. Furdyna; R. Binder; OREGON UNIV EUGENE
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| Research efforts have focused on the development and implementation of electromagnetically-induced transparency (EIT) from electron spin coherence in a semiconductor quantum well waveguide. Experimental studies have shown an induced transmission resonance arising from the electron spin coherence in the differential transmission spectrum. The induced resonance can be viewed as a signature of EIT from the electron spin coherence. Studies of the polarization and magnetic field dependence further confirm the physical ... |
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| Effect Of Substituents On UV-Vis Spectra And RSA Properties Of Phthalocyanine Compounds |
NOV 2006 |
8 pages |
| Authors:
Jan Andzelm; Adam Rawlett; Joshua Orlicki; James Snyder; Kim Baldridge; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| The use of optically transparent materials to modulate or impede laser light in a real time setting is significant. This goal stimulates an interest in metalloporphyrins, phthalocyanines, naphthalocyanins and their derivatives. The most desired derivatives would be optically transparent, absorb laser light and also be soluble in water. Phthalocyanines (PC) with their stable, planar square structure and highly delocalized pi-electron system, are being used in numerous technological applications, such as ... |
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| International Conference on Electronic Processes in Organic Materials (6th) Held in Gurzuf, Crimea, Ukraine, on September 25-29, 2006 |
29 SEP 2006 |
215 pages |
| Authors:
Ya. Vertsimakha; UKRAINIAN ACADEMY OF SCIENCES KIEV INST OF PHYSICS
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| The Final Proceedings for 6th International Conference `Electronic Processes in Organic Materials', 25-29 September 2006. This conference will cover the following topics: 1. Energy structure of organic materials and electronic processes in organic compounds 2. Electronic processes at interfaces of organic materials to metals, as well as biological, organic, inorganic media and nanostructures 3. Electro-optic processes in confined liquid crystals 4. Nonlinear properties of organic structures and composites 5. Electronic ... |
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| Novel Two- and Three-Photon Pumped Lasing Dyes: Design, Synthesis, and Characterization |
01 SEP 2006 |
13 pages |
| Authors:
Tzu-Chau Lin; NATIONAL DONG HWA UNIV HUALIEN (TAIWAN)
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| In this proposed research project, efforts have been focused on the synthesis and optical properties characterization of some multi-photon absorbing chromophores especially with frequency up-converted stimulated emission behavior. This research project was originally aimed to study some structural parameters that may affect the multi-photon pumped stimulated emission properties in dye molecules. The structural parameters that was attempted to investigate include the substituent effects (types and/or positions) and chromophoric unit number ... |
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| Polymer Film with Optically Controlled Form and Actuation (Postprint) |
SEP 2006 |
9 pages |
| Authors:
Timothy Bunning; Nelson Tabiryan; Svetlana Serak; Xiao-Man Dai; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SURVIVABILITY AND SENSOR MATERIALS DIV/HARDENED MATERIALS
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| A low power laser beam is used to induce large and fast variations in the shape of a polymer film due to photoinduced contraction and expansion of the polymer film surface subject to the beam. The direction of the photoinduced bend or twist of the polymer can be reversed by changing the polarization of the beam. Thus the film orientation could be varied within + or - 70 deg. The ... |
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| Radiation Resistant Polymer-Based Photonics for Space Applications |
AUG 2006 |
9 pages |
| Authors:
E. W. Taylor; J. Nichter; F. Nash; F. Haas; A. A. Szep; D. Craig; D. Le; H. R. Fetterman; C. Castaneda; R. Barto; INTERNATIONAL PHOTONICS CONSULTANT ALBUQERQUE NM
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| Empirical data regarding the radiation induced responses of Mach Zehnder interferometric electro-optic polymer based modulators (PBMs) operating at 1310 and 1550 nm and broadband InP quantum dot (QD) polymer photodetectors (PPDs) operating into the near infrared (NIR) are reported. Modulators composed of spun-on materials and hybrid electostatically self assembled (ESA) and spun-on NLO materials are examined for changes to their half-wave voltage and insertion losses. Pre- and post- irradiation responses ... |
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| Modeling Complex Nonlinear Optical Systems |
JUL 2006 |
29 pages |
| Authors:
Alejandro Aceves; Todd Kapitula; NEW MEXICO UNIV ALBUQUERQUE DEPT OF MATHEMATICS AND STATISTICS
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| This research dealt with the modeling of light propagation in nonlinear periodic media including bragg grating fiber arrays and periodic nonlinear 2-dimensional waveguides. The goals set were to find conditions for stable pulse propagation in the arrays and for the search of light bullets, their stability and propagation characteristics in the two dimensional waveguide. We also established conditions for optical trapping in a defect. This is a topic of great ... |
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| Pulse Compression using a Tapered Microstructure Optical Fiber |
APR 2006 |
12 pages |
| Authors:
Jonathan Hu; Brain S. Marks; Curtis R. Menyuk; Jinchae Kim; Thomas F. Carruthers; Barbara M. Wright; Thierry F. Taunay; E. J. Friebele; MARYLAND UNIV BALTIMORE COUNTY BALTIMORE MD
|
| We calculate the pulse compression in a tapered microstructure optical fiber with four layers of holes. We show that the primary limitation on pulse compression is the loss due to mode leakage. As a fiber's diameter decreases due to the tapering, so does the air-hole diameter, and at a sufficiently small diameter the guided mode loss becomes unacceptably high. For the four-layer geometry we considered, a compression factor of 10 ... |
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| Development of a Multiple Beam Combiner Using Stimulated Raman Scattering in Multimode Fiber |
MAR 2006 |
81 pages |
| Authors:
Brian M. Flusche; AIR FORCE RESEARCH LAB KIRTLAND AFB NM DIRECTED ENERGY DIRECTORATE
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| Beam combination was demonstrated by splitting the beam from a Q-switched Nd:YAG (Neodymium:yttrium-aluminum-garnet) laser and pumping a multiple input, single output fiber squid. Beam cleanup of the resulting output beam using stimulated Raman scattering was then demonstrated in both 100 micrometer fiber and 200 micrometer fiber. Energy conversion efficiency into the Stokes beam was measured as a function of input energy and found to be limited by the attenuation characteristics ... |
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| A Study of Collapse Events in Ultraviolet Light Filaments Due to Transient Edge Effects |
MAR 2006 |
110 pages |
| Authors:
Paul L. Muller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT/DEPT OF ENGINEERING PHYSICS
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| Intense, short light pulses can form filaments capable of propagating kilometers through the atmosphere. This is due to the nonlinear index of refraction of the atmosphere in response to the pulse's high intensity, which creates a self-focusing effect that further intensifies the pulse. This focusing is balanced by the formation of defocusing plasma by the pulse. A split-step propagation model was used to simulate the propagation of these pulses through ... |
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| Increasing the Laser Induced Damage Threshold of Single Crystal ZnGeP2 |
MAR 2006 |
21 pages |
| Authors:
Kevin T. Zawilski; Scott D. Setzler; Peter G. Schunemann; Thomas M. Pollak; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| The laser induced damage threshold (LIDT) of single crystal zinc germanium phosphide (ZGP), ZnGeP2, was increased to 2 J/cm2 at 2.05 microns and 10 kHz pulse rate frequency (double the previously measured value of 1 J/cm2). This increased LIDT was achieved by improving the polishing of ZGP OPO crystals. The surface preparation of ZGP samples was determined to be of great importance because laser-induced damage has been observed to always ... |
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| Optically Controlled Quantum Dot Spins for Scaleable Quantum Computing |
17 JAN 2006 |
8 pages |
| Authors:
Duncan G. Steel; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| This program conducted experimental research aimed at developing an optically driven quantum dot quantum computer. The work was done in collaboration with D. Gammon at the Naval Research Laboratory and L. J. Sham at UCSD. D. Gammon had responsibility for growing & characterizing the material, L. J. Sham is responsible for theoretical support & concept development. The group at Michigan along with this QuaCGR student are responsible for experimental demonstration ... |
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| Characterization of HVPE-Grown Thick GaAs Structures for IR and THz Generation |
Jan-2006 |
5 pages |
| Authors:
M Avella; J Jimenez; D Bliss; X Yu; C Lynch; T Zens; P S Kuo; D Weyburne; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
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| In a previous paper, we described a method for growing thick epitaxial layers of GaAs on orientation-patterned wafers by low pressure hydride vapor phase epitaxy. The low pressure method allows for rapid growth at rates well above 100 microns/hr and layers up to 1 mm thick have been successfully produced. In this paper we present characterization of these layers by optical microscopy, Hall measurement, and cathodoluminescence imaging. We demonstrate growth ... |
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| Multiple Channel Laser Beam Combination and Phasing Using Stimulated Brillouin Scattering in Optical Fibers |
22 DEC 2005 |
176 pages |
| Authors:
Brent W. Grime; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Brightness scaling lasers using stimulated Brillouin scattering (SBS) in optical fibers is explored. A multiple-channel amplifier approach is used to increase the total power of a laser system while avoiding a significant burden on a single channel. The work explores two approaches utilizing both SBS beam cleanup and SBS piston error conjugation. A unique beam combiner that takes advantage of the SBS beam cleanup properties of a long, gradient-index multimode ... |
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| Multiple Channel Laser Beam Combination and Phasing Using Stimulated Brillouin Scattering in Optical Fibers |
DEC 2005 |
176 pages |
| Authors:
Brent W. Grime; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Brightness scaling lasers using stimulated Brillouin scattering (SBS) in optical fibers is explored. A multiple-channel amplifier approach is used to increase the total power of a laser system while avoiding a significant burden on a single channel. The work explores two approaches utilizing both SBS beam cleanup and SBS piston error conjugation. A unique beam combiner that takes advantage of the SBS beam cleanup properties of a long, gradient-index multimode ... |
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| Advanced High-Power Near-Infrared Fiber Lasers |
15 SEP 2005 |
34 pages |
| Authors:
Anca Mocofanescu; Ravinder Jain; NEW MEXICO UNIV ALBUQUERQUE CENTER FORHIGH TECHNOLOGY MATERIALS
|
| Experiments were conducted to study stimulated Brillouin scattering (SBS) in optical fibers with a goal of studying its applicability for phase conjugation of radiation from CW lasers, and of using SBS to demonstrate high power fiber lasers by coherent combination of beams from several fiber amplifiers. It was determined that usual plane-wave theory of SBS does not correctly predict the threshold when applied to SBS in single-mode step-index and multimode ... |
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| Generation of Visible Radiation in Periodically Poled, Nearly-Stoichiometric Lithium Tantalate |
09 JUN 2005 |
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| Authors:
Douglas J. Bamford; David J. Cook; Scott J. Sharpe; Allen Tracy; Camilo A. Lopez; PHYSICAL SCIENCES INC SAN RAMON CA
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| Stoichiometric lithium tantalate (SLT) has been identified as a promising alternative to congruent lithium niobate as substrate material for quasi-phasematched (QPM) nonlinear optical frequency conversion. The advantages of SLT include superior resistance to optical damage, greater ultraviolet transparency, and a lower coercive field which should facilitate the fabrication of thicker periodically poled chips. We report the generation of 16 W of average power at 589 nm by single-pass sum-frequency generation ... |
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| Synthesis of Porphyrin Materials with Optimized Excited State Absorption Properties |
06 APR 2005 |
7 pages |
| Authors:
Harry L. Anderson; OXFORD UNIV (UNITED KINGDOM)
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| This report results from a contract tasking The Chancellor, Masters and Scholars of the University of Oxford as follows: The contractor will investigate the nonlinear response of porphyrin-based materials to intense laser illumination. Porphyrin-based materials have shown nonlinear coefficients an order of magnitude greater than other organic compounds. The contractor will synthesize and analyze various forms of these materials to optimize their nonlinear optics properties. |
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| Quantum Optics with Single Atoms and Photons |
02 FEB 2005 |
6 pages |
| Authors:
H. J. Kimble; CALIFORNIA INST OF TECH PASADENA NORMAN BRIDGE LAB OF PHYSICS
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| This research program investigated the dynamics of open quantum systems in manifestly quantum or nonclassical domains. The research program exploited recently discovered possibilities in the microscopic realm of quantum mechanics to accomplish tasks that would otherwise be impossible by traditional classical means, including new capabilities for precision measurement and for the processing and distribution of information. Within this setting, the particular investigations related to strong coupling in optical physics whereby ... |
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| Cooperative Agreement between Lehigh University and the Army Research Laboratory to Support Research into Electronics |
10 DEC 2004 |
12 pages |
| Authors:
Rick Vinci; Jim Hwang; Miltos Hatalis; Himanshu Jain; Yujie Ding; LEHIGH UNIV BETHLEHEM PA
|
| The final results and status of the 9 projects that were previously reviewed during a face-to-face meeting on 15 November 2004 in Adelphi, Maryland, are attached to this cover sheet. The projects are as follows: Characterization of AlGaN Active Regions; Integration of Laser Drivers with VCSEL Arrays-Phase II; Development of Hard Photoresist Masks Using Photoinduced Compositional Changes; Robust Micro-Electro-Mechanical-Systems (MEMS); InAs/GaSb Type-II Super Lattices: Nonlinear Optical Effects; HgCdTe on Si ... |
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| Stability and Transient Effects in Ultraviolet Filaments |
SEP 2004 |
135 pages |
| Authors:
Thomas A. Niday; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Short, high intensity laser pulses induce nonlinear optical effects in the atmosphere that have the potential to make them propagate for long distances. Applications for long distance propagation of short pulses include active spectral remote sensing and laser lightning control. Much of the work in this field has been done with infrared pulses; however, it has been proposed that ultraviolet pulses have the advantage that longer pulse lengths can be ... |
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| Wave Propagation in a Volume Hologram with Multiple Diffraction Gratings |
10 AUG 2004 |
24 pages |
| Authors:
Steven J. Frederick; FRANCIS MARION UNIV FLORENCE SC
|
| In the last 10 years, Bragg diffraction gratings have been developed at CREOL using photo-thermo-refractive (PTR) glass, which is not sensitive to radiation or temperatures to 400 degrees C, and can withstand high-intensity laser beams without damage or change in the Bragg angle. In this work, a new type of Bragg grating, not yet fabricated, is being studied to predict its properties. It is composed of two gratings in the ... |
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| Fundamentals and Application of Stimulated Brillouin Scattering in Optical Fibre |
MAY 2004 |
10 pages |
| Authors:
Robert Harrison; W. Lu; HARRISON (ROBERT G) EDINBURGH (UNITED KINGDOM)
|
| This report results from a contract tasking Dr, Robert G Harrison as follows: The contractor will investigate expansion of his existing computer code in order to model Stimulated Brillouin Scattering (SBS) in an optical fiber and its dependence on numerical aperture and laser power He will investigate the appearance of both stochastic and deterministic elements in the observed SBS and using his modified computer model, determine the optimum conditions for ... |
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| Synthesis and Characterization of Polyimides to be Used in the Fabrication of a Low Driving Voltage Electro-Optic Modulator |
APR 2004 |
44 pages |
| Authors:
Connie Walton; Sergey Sarkisov; GRAMBLING STATE UNIV LA
|
| The aim of this project was to synthesize polyimides that exhibit second order nonlinear optic behavior and to fabricate a Low Driving Voltage Electro-optic Modulator. Undergraduate and graduate students were involved in all aspects of this project. A high temperature polyimide that had a NLO chromophore incorporated was synthesized and its properties characterized. The E-O Coefficient of the polyimide was determined to be 1.98pm/V and expected to have a driving ... |
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| Nanocomposite Materials and Microstructured Devices for Optical Limiting and Switching and Photovoltaic Applications |
12 MAR 2004 |
40 pages |
| Authors:
Joseph Perry; Jean-Luc Bredas; Bernard Kippelen; Seth R. Marder; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
|
| This is a multi-investigator program, involving an integrated theory and modeling, synthesis, nonlinear optical spectroscopy, and electronic characterization effort, that is being undertaken by the Perry, Bredas, Kippelen and Marder groups. The activities being pursued under this AFOSR program are: 1) development two-photon absorbing molecules with large two-photon cross sections and excited-state absorption cross sections for optical power limiting applications, 2) chromophore/ nanoparticle assemblies with enhanced nonlinearity for optical power ... |
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| Engineered Photonic Materials for Nanoscale Optical Logic Devices |
24 FEB 2004 |
7 pages |
| Authors:
Steve Blair; UTAH UNIV SALT LAKE CITY
|
| Two major activities of this grant were to develop a generalized approach to the enhancement of nonlinear optical effects based upon slow-light propagation in artificial resonators and the study of nonlinear self-focusing in periodic arrays of photonic microcavities, thereby providing a mechanism for the formation of very narrow (i.e. wavelength scale) spatial solitons at very low powers. |
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| MURI Fellow on Quantum Information Technology: Entanglement, Teleportation, and Quantum Memory |
31 JAN 2004 |
5 pages |
| Authors:
Prem Kumar; Jay E. Sharping; NORTHWESTERN UNIV EVANSTON IL DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| This grant supported a MURI Fellow to work on topics in the area of Quantum Information Technology. Specifically, Jay E. Sharping worked on the following research tasks: i) Generation of polarization-entangled photon-pair pulses near 1.5 micron wavelength by use of the Kerr nonlinearity of standard dispersion-shifted optical fiber and ii) applying the same techniques to obtain polarization-entangled photon-pair pulses near the 0.8 micron wavelength by use of novel micro-structured optical ... |
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| Electro-Optic Modulation and Mirrorless Lasing Using Unique Organic Materials and Single-Crystal Films |
05 DEC 2003 |
7 pages |
| Authors:
Mrinal Thakur; AUBURN UNIV AL DEPT OF MECHANICAL ENGINEERING
|
| The accomplishments in this project include the following: (1) preparation of single-crystal films of specific organic nonlinear optical materials, including molecular salts such as DAST; (2) measurement of electro- optic coefficients; (3) demonstration of electro-optic modulation with a modulation depth of 80% at a field of 4 V/micrometers for a single-pass device (using a 3-micrometer thick film); (4) demonstration of high-speed modulation with a speed up to 1.5 GHz; (5) ... |
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| New Principles of Laser-Based Radiation an Particle Sources |
DEC 2003 |
33 pages |
| Authors:
Alexander E. Kaplan; JOHNS HOPKINS UNIV BALTIMORE MD HOMEWOOD RESEARCH ADMINISTRATION
|
| Since this AFOSR grant started on January 1, 1999, a number of new results were obtained by this PI and his group in the field of nonlinear optics and quantum electronics, in the following directions: 2.i. Continuing pioneering research on sub-femtosecond pulses and physics with them, in particular 6- ionization by super-short pulses and discovery of so called area resonances in ionization of quantum wells by sub-cycle field pulses 2.ii. ... |
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| Joint Services Optics Program Reasearch in the Optical Sciences |
21 OCT 2003 |
47 pages |
| Authors:
James C. Wyant; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report describes research on eight different projects ranging from fundamental quantum optics to optical engineering. Topics discussed include me following: Collisional dark states and matter wave transparency, high power diffraction limited surface emitting flared lasers, qubits and quantum gates with laser trapped atoms, radiatively perfect quantum dot, 3D semiconductor nanocavities, excitonic and biexcitonic nonlinear optical processes in semiconductor quantum wells, blue lasers and near field techniques for ultra high ... |
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| Development of Nonlinear Optical Materials (LBO, BBO, and KTP) for Use in High-Power Lasers |
15 OCT 2003 |
12 pages |
| Authors:
Larry E. Halliburton; Nancy C. Giles; WEST VIRGINIA UNIV RESEARCH CORP MORGANTOWN*
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| This is the final technical report for a three-year project to identify and characterize point defects in single crystals of LiB(3)O(5) (LBO), Beta-BaB(2)O(4) (BBO), KTiOPO(4) (KTP), KH(2)PO(4), and ZnO. These materials are used to generate ultraviolet laser beams, and their performance is often limited by the present of optically active point defects. In this project, we have investigated a variety of electron and hole traps and have shown how they ... |
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| New Materials Design |
28 MAY 2003 |
12 pages |
| Authors:
Jerry Boatz; Mark S. Gordon; Gregory Voth; Sharon Hammes-Schiffer; Ruth Pachter; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| In this paper we report our recent results on the design of materials with controlled properties by the application of computational chemistry methods, new algorithms and scalable software. |
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| Azulenic Chromophores For Optical Limiting and Other Nonlinear Optical Applications |
22 APR 2003 |
24 pages |
| Authors:
Alfred E. Asato; Robert S. Liu; HAWAII UNIV HONOLULU DEPT OF CHEMISTRY
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| We summarize our studies of the chemical, photophysical, optical limiting, and other nonlinear optical properties of long wavelength-absorbing azulene derivatives; namely, fluorinated azulenes, azulenic donor-acceptor molecules, and reverse saturable aborber azulenic symmetrical dye chromophores. The effect of fluorine and other substituents on the excited singlet state properties of azulene and, in particular, the enhancement of first excited state lifetimes and fluorescence quantum yields was investigated. Both Hyper-Raleigh Scattering and Resonance ... |
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| High Power Femtosecond Laser Light Strings |
28 FEB 2003 |
6 pages |
| Authors:
J. V. Moloney; ARIZONA UNIV TUCSON DEPT OF MATHEMATICS
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| This project funded for 2.5 years, focused on the modeling of high power femtosecond pulse propagation in air. The work has been very successful and has received a broad exposure amongst academic, industry and DOD communities. Potential applications abound for light strings and the RF electromagnetic pulses emitted from plasma channels generated by these light strings. A number of papers have been published in the literature and others are submitted ... |
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Reports by Keyword(s)
NONLINEAR OPTICS
