| Optical Arbitrary Waveform Generators Based on Temporal and Spectral Shaping of Optical Pulses in Nonlinear Metamaterials |
JUN 2011 |
12 pages |
| Authors:
Costantino De Angelis; UNIVERSITA DI BRESCIA (ITALY) DIPARTIMENTO DI ELETTRONICA
|
 | The final goal of the research project is the theoretical design of new optical devices on a Lithium Niobate and Tantalate platform; in particular we will focus on low-cost integrated optical pulse shapers on periodically poled Lithium Niobate and Tantalate waveguides. Our approach will be mainly used to design pulse shapers, but it also might open new design perspectives for other optical devices. In fact the continuous progress in the ... |
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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
|
| 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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| 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
|
| 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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| Quasi-Phasematched Nonlinear Optics: Materials and Devices |
16 APR 2007 |
29 pages |
| Authors:
M. M. Fejer; R. Gaume; J. Huang; D. Hum; P. Kuo; R. Roussev; R. Route; A. Schober; J. Wisdom; X. Xie; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
| This program focused on the development of micro-structured nonlinear optical materials and quasi- phasematched devices based on those materials. The two material systems investigated, periodically-poled ferroelectrics, especially lithium niobate (PPLN), and orientation-patterned GaAs (OP-GaAs), enable nonlinear interactions impossible in conventional nonlinear media. The work included characterization of vapor- transport-equilibrated materials, enhancements in periodic-poling technology, and development of tight bends in proton-exchanged waveguides. After the materials characterization and improvements in process ... |
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| Photovoltaic Induced Grating Instabilities (Preprint) |
FEB 2006 |
9 pages |
| Authors:
D. R. Evans; G. Cook; J. L. Carns; M. A. Saleh; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SURVIVABILITY AND SENSOR MATERIALS DIV/HARDENED MATERIALS
|
| The PV field is responsible for undesirable grating recording noise, or spikes in transmitted power. Corresponding spikes in the transmission of light incident at the Bragg angle indicate the grating is partially destroyed rather than momentarily dephased. The noise is most likely due to a sudden strong current and/or avalanche current flow through the bulk crystal, such that the E(sub sc) is randomized and the grating is partially destroyed. |
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| Photovoltaic Field-Induced Self-Phase Modulation in Liquid Crystal Cells (Preprint) |
JAN 2006 |
12 pages |
| Authors:
Jennifer L. Carns; Gary Cook; Mohammad A. Saleh; Svetlana V. Serak; Nelson V. Tabiryan; Sergei A. Basun; Dean R. Evans; ANTEON CORP DAYTON OH
|
| We show that photovoltaic fields generated internally in LiNbO3:Fe substrates are capable of efficiently reorienting liquid crystal molecules leading to new concepts of optically addressable light modulators. Using an arrangement consisting of a liquid crystal layer in contact with one or more LiNbO3:Fe photovoltaic substrates, we observe spatial filtering due to self-phase modulation in a planar oriented cell. The LiNbO3:Fe substrates are arranged such that light propagates along the +c ... |
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| Tunable Solid-State Mid-IR Laser Engineering |
JUL 2005 |
15 pages |
| Authors:
Kenneth L. Schepler; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| This report describes in-house efforts to develop advanced tunable mid-IR laser materials and nonlinear frequency conversion techniques useful for IRCM and laser radar sources. We developed a new class of laser materials, Cr2+doped II-VI materials, with broadband tunability in the 2-3 micron region with room temperature operation and 4.2-W output. We fabricated periodically poled ferroelectric materials and demonstrated broadband tuning and narrowband seeding. We demonstrated pulse energies of 60mJ from ... |
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| Polymer Waveguides for Quantum Information |
JAN 2005 |
10 pages |
| Authors:
Kamala Mahanta; STATE UNIV OF NEW YORK COLL AT ONEONTA
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| Electro-optic materials have shown great potential for improving the performance of waveguided communication systems for use in quantum information processing (cryptography, communication, computing, etc.) where the transmission of a single photon or a very small amount of light plays a critical role in establishing the quantum nature of the process. These materials offer significant advantages over inorganic materials such as LiNbO3 or compound semiconductors due to their large EO-coefficients, low ... |
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| Microphotonic RF Receiver Components |
15 JUN 2004 |
116 pages |
| Authors:
A. F. Levi; Mani Hossein-zadeh; Fernando Harriague; David Cohen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| A novel microphotonic RF wireless receiver that exploits nonlinear modulation in a LiNbO3 microdisk to achieve direct photonic down-conversion from a RF carrier without using any high-speed electronic elements has been demonstrated. Laboratory experiments include receiving a wireless Ku band RF signal by conversion to an optical carrier, processed in the optical domain, and then extracting base band information using self-homodyne direct detection. |
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| Continuous-Wave Tunable Midwave Infrared Generation Near 4.5 micrometers with an Intracavity Optical Parametric Oscillator and Difference Frequency Generation |
30 DEC 2003 |
10 pages |
| Authors:
Da Wun Chen; AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
|
| Continuously tunable cw emission near 4.5 micrometer was generated by difference frequency generation (DFG) within a Nd:YAG pumped optical parametric oscillator (OPO). The periodically poled lithium niobate crystal used for DFO contained eight grating bands that enabled wavelength tuning between 4.25 and 5. 65 micrometer. As much as 90 mW of power at 4.48 micrometer was achieved for 16. 7 W of pump. |
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| New Techniques for Heterogeneous Integration for Optical Sensing Systems |
DEC 2003 |
8 pages |
| Authors:
Richard M. Osgood Jr; COLUMBIA UNIV NEW YORK MICROELECTRONICS SCIENCE LAB
|
| During the two-year duration of this program, we accomplished or made significant progress in three objectives for specific integrated optical systems. The general technology focus was to develop practical methods for reducing the physical dimensions of optical circuits through manipulation of the device geometry and refractive-index profile and develop several new integrated optical devices on LiNbO3 devices. Our research on LiNbO3 has yielded a new low voltage E/O scanner, techniques ... |
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| Narrowband Mid-Infrared Generation in Elliptically Pumped Periodically Poled Lithium Niobate |
FEB 2003 |
5 pages |
| Authors:
Peter E. Powers; Prasanth K. Bojja; Eric Vershure; Kenneth L. Schepler; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
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| Narrow bandwidths and near diffraction limited beam divergence are demonstrated in an elliptically pumped, diode-laser seeded, optical parametric generator. This represents a significant step towards high-energy tunable infrared systems with favorable beam characteristics. |
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| New Techniques for Heterogeneous Integration for Sensing Systems |
11 SEP 2002 |
11 pages |
| Authors:
Richard M. Osgood Jr.; TRUSTEES OF COLUMBIA UNIV NEW YORK
|
| The program's objective was to develop design and fabrication techniques for integrated optical/microwave RF systems and mid-IR optical waveguide components. Research in the areas of specific integrated optical systems and has yielded the development of the crystal ion slicing (CIS) technique for single-crystal LiNbO3 films for integrated photonics applications. We have also demonstrated second harmonic generation in these lithium niobate films, direct bonding of metal oxides films onto semiconductor substrates, ... |
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| Development of High Average Power Nonlinear Frequency Conversion Devices |
AUG 2002 |
18 pages |
| Authors:
Martin M. Fejer; Robert K. Route; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
| This program developed microstructured nonlinear optical materials and quasi-phasematched devices based on those materials. The two material systems investigated, periodically-poled ferroelectrics, especially lithium niobate (PPLN), and orientation-patterned GaAs (OP-GaAs) enable nonlinear interactions impossible in conventional nonlinear media. This work included the generation of the shortest blue light pulse then reported (5,4 fs), demonstration of orientation patterned GaAs (OP-GaAs), a mid-IR analog for PPLN operating to wavelengths > 12 micrometers with ... |
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| International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000 |
24 OCT 2001 |
426 pages |
| Authors:
Antoni Rogalski; Pawet Madejczyk; Krzysztof Adamiec; MILITARY UNIV OF TECHNOLOGY KALISKIEGO(POLAND) INST OF APPLIED PHYSICS
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| Partial Contents: Scope of ZnO growth; Influence of mechanical stress on the growth of crystals; Crystal growth of new functional materials for electro-optical applications; Possibilities and limitations of multioxide crystals growth; Single-domain HTC superconducting materials synthesis: BaZrO3 substrates as a tool for optimized systems; Very high quality crystals of wide- gap II-V semiconductors: What for?; Annealing of GaSb single crystals in ionized hydrogen atmosphere; Growth and structure of strontium-doped LaGaO3; ... |
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| Effect of Scattering Noise on the Data Fidelity of Holograms Recorded in Photorefractive Crystals |
APR 2001 |
6 pages |
| Authors:
Mingyan Qin; Shiquan Tao; Guoqing Liu; Xiaohong Ding; Dayong Wang; POLYTECHNIC UNIV BEIJING (CHINA) COLLEGE OF APPLIED SCIENCES
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| In this paper a method is proposed to investigate how the scattering noise of photorefractive crystals influences the quality of an input data page in holographic storage. By illuminating the crystal under investigation with an intense coherent light beam, and measuring the signal-to-noise ratio (SNR) of an image formed through the crystal before and after the exposure, the loss of SNR provides a good assessment for the suitability of the ... |
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| A Study on Batch Method of Thermal Fixing for Multiplexed Holographic Recordings |
APR 2001 |
6 pages |
| Authors:
Zhuqing Jiang; Gang Meng; Guoqing Liu; Shiquan Tao; POLYTECHNIC UNIV BEIJING (CHINA) COLLEGE OF APPLIED SCIENCES
|
| We have investigated the batch method of thermal fixing for multiplexed holograms. The batch fixing process is pictured and analyzed, for the first time to our knowledge. The batch procedure of thermal fixing includes optical erasure of electronic gratings by subsequent recordings both in the same batch and in different batches, ionic compensation during thermal fixing in one batch, smoothing of ionic gratings during thermal fixing of subsequent batches, and ... |
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| Optical Parametric Generation of Greater Than 30 mJ Signal Energies in PPLN Stacks |
2001 |
5 pages |
| Authors:
Stephen M. Russel; Peter E. Powers; Mark J. Missey; Kenneth L. Schepler; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| We report generation of high energy mid-IR pulses by pumping stacks of PPLN crystals with multiple elliptical beams in a single-pass optical parametric generator. Signal energies as high as 33 mJ in 3.5-nsec pulses were achieved with bare (uncoated) PPLN crystals while maintaining excellent beam quality. |
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| Sensitivity of Surface Acoustic Waves Devices |
2001 |
6 pages |
| Authors:
Jerzy Filipiak; Konrad Zubko; MILITARY UNIV OF TECHNOLOGY KALISKIEGO(POLAND) INST OF APPLIED PHYSICS
|
| The Surface Acoustic Waves (SAW) devices are widely used as filters, delay lines, resonators and gas sensors. It is possible to use it as mechanical force. The paper describes sensitivity of acceleration sensor based on SAW using the Rayleigh wave propagation. Since characteristic of acceleration SAW sensors are largely determined by piezoelectric materials, it is very important to select substrate with required characteristics. Researches and numerical modeling based on simply ... |
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| Effect of Divergence of Light Wave and Alignment of Crystal on the Response of Electrooptic Modulators |
2001 |
6 pages |
| Authors:
M. Izdebski; Wlodzimierz Kucharczyk; LODZ TECHNICAL UNIV (POLAND) INST OF PHYSICS
|
| In this work we report on numerical investigations of the effect of the light beam divergence or imperfect crystal alignment on the response of electrooptic modulators. Resulting nonlinearities are discussed both in terms of nonlinear distorsions of modulators and as related to errors in measurements of quadratic electrooptic coefficients. Our calculations based on the Jones calculus have been performed for uniaxial crystals including KDP, and its isomorphs, and LiMbO3 The ... |
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| Controlling of the Charge States in Laser Crystals |
2001 |
6 pages |
| Authors:
S. M. Kaczmarek; MILITARY UNIV OF TECHNOLOGY WARSAW (POLAND) INST OF OPTOELECTRONICS
|
| In this paper changes in active and lattice ions valence were investigated in some laser materials such as: Cr:Y3Al5O12, Cr:LiNbO3 and Cr:Li2B4O7 glass, Ti:A12O3 and Ti:LaGaO3, Co:SrLaGa3O7 and Co:Li2B4O7 glass, Eu, Dy: Li2B4O7 glass, Ho:LiTaO3, Nd:YVO4, Nd:SrlaGa3O7 and Pr:SrLaGa3O7 alter annealing in oxidizing and reducing atmospheres, ionizing with gamma, electrons and protons After gamma-irradiation 446 run emission is observed for Ti:LaGaO3 single crystal due to (sup 2 E) right arrow ... |
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| Fourier Transform THz-Wave Spectrometer Using THz-Wave Parametric Generator |
29 SEP 2000 |
4 pages |
| Authors:
Jun-ichi Shikata; Kodo Kawase; Tetsuo Taniuchi; Hiromasa Ito; TOHOKU UNIV SENDAI (JAPAN) RESEARCH INST OF ELECTRICAL COMMUNICATION
|
| We have developed a THz-wave spectrometer with the combination of a bright THz-wave source of THz-wave parametric generator (TPG) and a Martin- Puplett interferometer. The TPG output was optimized by studying various configurations with LiNbO3 crystals. THz-waves which span the 1-2THz region were emitted with the peak power of 280 micro W. The whole system, including the nitrogen-purge unit, was constructed in a table-top size. By use of the THz-wave ... |
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| Attempt to Generate Narrow Linewidth, CW Terahertz Radiation by Using Optical Frequency Comb |
29 SEP 2000 |
3 pages |
| Authors:
S. M. Iftiquar; Kiyomi Sakai; Masahiko Tani; Bambang Widiyatmoko; Motonobu Kourogi; KANSAI ADVANCED RESEARCH CENTER KOBE (JAPAN) TERAHERTZ OPTOELECTRONIC RESEARCH GROUP
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| We report on an attempt to generate highly stable continuous terahertz (THz) wave by using optical frequency comb (OFC). About 10-nm wide OFC has been generated through a deep phase modulation of a 852 nm laser line in lithium niobate crystal cavity. The multiple optical modes (side bands) of the OFC, which are equally separated from each other by the modulation frequency (=6 GHz) are taken as the frequency reference. ... |
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| Semiconductor In-line Fiber Devices for Optical Communication Systems |
21 AUG 2000 |
31 pages |
| Authors:
J. S. Harris; STANFORD UNIV CA
|
| A high-performance optical communication system requires high- performance optoelectronic devices. The conventional approach to fabricating fiber-coupled devices involves the interruption of the fiber and the insertion of the device. Several drawbacks are associated with this approach, including high insertion loss, mechanical instability, and high packaging costs. In-line fiber devices, in which light is evanescently coupled between single mode fibers and multimode high index waveguides, offer ... |
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| Combined Far-Infrared & Optical Probes of Semiconductor Quantum Structures |
22 JUL 2000 |
12 pages |
| Authors:
Theodore B. Norris; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| We report on a program in which we have developed a terahertz time- resolved spectroscopy system with electro-optic generation and detection, incorporating a femtosecond optical pump pulse suitable for studying the dynamics of impulsively photo-generated carriers using the THz probe. In the course of this work, we have developed an entirely new way of generating tunable coherent narrow-band (multi-cycle) THz waveforms using femtosecond pulses, suitable ... |
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| Tunable MID-IR Optical Parametric Oscillator Using Periodically Poled Rubidium Titanyl Arsenate |
MAR 2000 |
59 pages |
| Authors:
Frank J. Glavic; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
|
| Tunable sources of coherent radiation are needed for a variety of military and commercial applications, including infrared countermeasures and atmospheric remote sensing. This research investigates a tunable mid-infrared coherent source using periodically-poled rubidium titanyl arsenate (PPRTA) as a quasi-phase matched (QPM) optical parametric oscillator (OPO). The advantages of PPRTA over periodically poled lithium niobate (PPLN) are presented. Quasi-phase matching and periodic poling theory are discussed, along with some important historical ... |
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| Short-Pitch Periodically Poled Lithium-Niobate And Lithium Tantalate |
31 OCT 1999 |
64 pages |
| Authors:
Vladimir Y. Chour; URAL STATE UNIV SVERDLOVSK (RUSSIA) INST OF PHYSICS AND APPLIED MATHEMATICS
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| This report results from a contract tasking Ural State University as follows: The contractor will further investigate the back-switched poling method for periodic domain patterning with shorter domain periods in thick lithium niobate and lithium tantalate substrates. |
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| NLO Materials Workshop |
21 SEP 1999 |
|
| Authors:
DEFENCE EVALUATION AND RESEARCH AGENCY MALVERN (UNITED KINGDOM)
|
 | The Final Proceedings for Workshop on Nonlinear Optical Materials, 20 September 1999 - 21 September 1999. This is an interdisciplinary conference. Topics include: growth, characterization, and applications of chalcopyrites and other nonlinear optical materials for use in the mid-IR. |
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| Periodically-Poled Lithium Niobate for Spectroscopic Applications |
21 DEC 1998 |
12 pages |
| Authors:
Vince Dominic; DAYTON UNIV OH
|
| The Coherent Infinity laser was utilized in two different experimental investigations. One investigation was led by Andy Zakel and investigated pumping periodically-poled lithium niobate (PPLN) optical parametric oscillators (OPO's) and amplifiers (OPA's) with the Infinity laser while simultaneously seeding the OPO with the narrowband output of a tunable laser diode. The second investigation was led by Prof Peter Powers and investigated a widely tunable, narrow band spectroscopic source based on ... |
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| Synchronously Pumped Optical Parametric Oscillator with Intracavity Difference Frequency Mixing |
29 JUN 1998 |
175 pages |
| Authors:
Michael E. Dearborn; NEW MEXICO UNIV ALBUQUERQUE
|
| In this work we experimentally investigate a singly resonant optical parametric oscillator (OPO) with an intracavity crystal that mixes the signal and idler waves, enhancing the power conversion efficiency of the idler radiation. Optical parametric oscillators provide a method for producing coherent tunable radiation from a coherent fixed-frequency pump source. The pump frequency Wp 15 converted to the signal and idler frequencies Ws and Wi, respectively, in the OPO interaction, ... |
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| Impurity Potential Broadening of the Landau Level as Measured by an Acoustoelectronic Method |
JUN 1998 |
4 pages |
| Authors:
I. L. Drichko; A. M. Diakonov; V. D. Kagan; I. Y. Smirnov; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| In the quantum Hall regime the conductivitvy sigma(sub xx) measured in a direct current experiment is equal to 0, whereas the alternative current conductivity Q has a finite value. It has been shown that from the study of this a.c. conductivity one could obtain valuable characteristics of 2DEG and estimate the role of random fluctuation potential. As it has been demonstrated earlier one of the best methods for the study ... |
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| Development of Long Lifetime Photorefractive Crystals for Holographic Data Storage |
30 APR 1998 |
18 pages |
| Authors:
George A. Rakuljic; Anthony S. Kewitsch; ARROYO OPTICS INC SANTA MONICA CA
|
| The lifetime of thermally fixed photorefractive holograms in iron doped lithium niobate was investigated. A prescription for material preparation and fixing technique was developed that enables a thermally fixed hologram to be recorded in Fe-doped LiNbO3 with high diffraction efficiency and long lifetime. In particular, a hologram with a fixed photorefractive index modulation of ^10(exp -3) and a 100 year lifetime at room temperature is predicted. A lithium niobate crystal ... |
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| Double Sideband Suppressed Carrier Optical Modulator |
APR 1998 |
140 pages |
| Authors:
Ronald T. Logan Jr.; R. D. Bynum; Dilip Paul; Steve Bonocore; Jerry Wood; TRACOR AEROSPACE ELECTRONIC SYSTEMS INCLANSDALE PA
|
| The development of a novel single-chip integrated optic double sideband suppressed carrier (DSSC) modulator on lithium niobate substrate for operation at 1300 and 1550 nm wavelengths is described in this report. This chip contains two Mach-Zehnder (m-z) and two phase modulator sections which are computer controlled for operation at the third-order intermodulation distortion point minimum. To assess insertion potential into microwave/millimeter wave (mW/ mmW) systems, systems level performance characteristics of ... |
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| A Study of Radiation-Induced Effects in Photonic Devices: Acoustooptic Modulators and Deflectors |
JAN 1998 |
322 pages |
| Authors:
Edward W. Taylor; Anthony D. Sanchez; James E. Winter; Stanley J. McKinney; Alan H. Paxton; AIR FORCE RESEARCH LAB KIRTLAND AFB NMSPACE VEHICLES DIRECTORATE
|
| In a preliminary report acoustooptic devices (AODs) were exposed to flash x-ray, linearly accelerated electrons, and gamma ray irradiations to determine their sensitivity to radiation and applicability to space and enhanced radiation environments. This final report is a continuation and finalization of those initial studies and details the findings of a comprehensive investigation of radiation induced effects in Lead Molybdate (PbMoO4), Gallium Phosphide (GaP) , Indium ... |
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| Holographic Image Storage in Eu(3+)-Doped Alkali-Aluminosilicate Glasses |
1998 |
23 pages |
| Authors:
Abdulatif Y. Hamad; James P. Wicksted; OKLAHOMA STATE UNIV STILLWATER DEPT OFPHYSICS
|
| In this paper, we demonstrate that holographic information can be stored in Eu(3+)- doped alkali-aluminosilicate glasses. The holograms were developed using a two beam mixing configuration with a write-beam wavelength (465.8 nm) corresponding to the 7F0 yields 5D0 transition of the Eu(3+) ions. The images were reconstructed either with the wavelength used to record them or with wavelengths below this transition (543, 633 nm). Clear holographic images were stored using ... |
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| Novel Frequency Conversion Phenomena Based on Poled Polymers |
18 DEC 97 |
12 pages |
| Authors:
G. I. Stegeman; UNIVERSITY OF CENTRAL FLORIDA ORLANDO CENTER FOR RESEARCH IN ELECTRO-OPTICS AND LASERS
|
| The technology of second harmonic generation in channel waveguides made from poled polymers was developed for interaction geometries appropriate for (1) cascading and wavelength shifting, and (2) for wavelength demultiplexing. For fundamental beams which generate a harmonic along the same propagation direction, various phase matching geometries were studied which relied on periodically modulating the linear refractive index and/or the nonlinearity (QPM) in DANS. Although this approach with interdigitated poling electrodes ... |
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| Holographic Storage and Processing for Very Large Relational Databases |
01 DEC 97 |
57 pages |
| Authors:
Pericles A. Mitkas; COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING
|
| Volume holographic memories combine high storage capacity, massive transfer rates, and the ability to associatively search the entire data set in a highly parallel way. Database applications can benefit greatly from these characteristics. The goal of this research was to evaluate the capability of volume holographic storage to perform associative recall on binary data of an actual database and, thus, operate successfully in a database management environment. An angularly multiplexed ... |
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| (AASERT 94-045) Holographic Associative Memories for Database Processing |
01 DEC 97 |
57 pages |
| Authors:
Pericles A. Mitkas; COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING
|
| Volume holographic memories combine high storage capacity, massive transfer rates, and the ability to associatively search the entire data set in a highly parallel way. Database applications can benefit greatly from these characteristics. The goal of this research was to evaluate the capability, of volume holographic storage to perform associative recall on binary data of an actual database and, thus, operate successfully in a database management environment. An angularly multiplexed ... |
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| High-Power CW Diode-Laser-Array-Pumped Solid-State Lasers and Efficient Non-Linear-Optical Frequency Conversion |
22 OCT 97 |
48 pages |
| Authors:
W. Tulloch; T. Rutherford; R. K. Route; Robert L. Byer; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
| The goals of this program were: development of high-power, cw diode- laser-array-pumped, Nd:YAG lasers, and efficient nonlinear frequency conversion of their output. Two minislab laser heads constructed as a single high power dual-head oscillator (96W, multi-mode) were operated separately to support Q- switched and cw nonlinear frequency conversion studies and single-frequency injection-locking studies and the start of cw amplifier research. A cw singly resonant optical parametric oscillator (SRO) utilizing bulk ... |
|
| Visible Upconversion Lasers -- Fiber and Planar Waveguide Devices |
JUN 97 |
46 pages |
| Authors:
J. G. Eden; ILLINOIS UNIV AT URBANA BOARD OF TRUSTEES
|
| This research program is directed towards the demonstration and development of compact sources of visible and ultraviolet radiation. One of the most significant accomplishments of the past two years is the demonstration of microdischarge devices fabricated in silicon. These devices are cylindrical in cross section with diameters 500 W-cm3 and are capable of operating at pressures above one atmosphere. Another highlight of this research effort is that the first fiber ... |
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| Photorefractive Tungsten Bronze Materials for Optical Computing |
FEB 97 |
93 pages |
| Authors:
R. R. Neurgaonkar; ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
|
| The optical tungsten bronze BSTN and BSKNN single crystals were investigated for photorefractive and guided wave optical applications with considerable success. These materials have both high optical figure of merit and low dark conductivity, making them potentially important for pattern recognition and 3-D memory applications. Undoped crystals are advantageous for electrooptic devices such as guided wave for telecommunication and signal processing. Under this effort, advances were made in growth of ... |
|
| Doubled Diode Laser (SBIR-95) |
24 JAN 97 |
10 pages |
| Authors:
David Deacon; Simon Field; DEACON RESEARCH PALO ALTO CA
|
| The Doubled Diode laser program aimed to produce a highly efficient blue laser source based on the frequency doubling of a semiconductor diode laser in a periodically poled lithium niobate waveguide. Under this program we have demonstrated waveguide doubling device conversion efficiencies of 300%/W, and generated more than 7mW of blue light The program has enabled us to attain a unique processing capability, that of producing the required 4.5 microm ... |
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| Microcontamination Sensor for VLSI Semiconductor Manufacturing |
23 JAN 97 |
19 pages |
| Authors:
Pajo Vujkovic-Cvijin; LOS GATOS RESEARCH MOUNTAIN VIEW CA
|
| Feasibility demonstration of a trace-level water vapor sensor has been performed in Phase 1. The sensor is critically needed in semiconductor industry, where trace concentrations of water in highly reactive gases used in Very Large Scale Integration (VLSI) manufacturing decrease significantly the yield of IC chips produced. The sensor described is based on optical spectroscopy in the middle infrared region, and uses a novel laser source, based on nonlinear frequency ... |
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| Diode-Pumped Optical Parametric Oscillator and Optical Frequency Comb Generation at 1.5 Micrometers |
31 DEC 96 |
8 pages |
| Authors:
Ngai C. Wong; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| An instrumentation grant for the purchase of an tunable diode laser- amplifier, a rf synthesizer, and a rf spectrum analyzer is used to significantly enhance current research and support new investigations in optical parametric oscillators and wide-span optical frequency comb generation. Areas of research that benefit from the new capabilities include precision frequency metrology, optical communications, and multi-wavelength information processing. The fabricated diode laser at 790 nm has been utilized ... |
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| Diode-Laser-Pumped Optical Parametric Oscillator |
OCT 96 |
82 pages |
| Authors:
Marc C. Cimolino; Carrie Sjaarda-Cornish; Robert Byer; Martin M. Fejer; Robert C. Eckardt; CYGNUS LASER CORP DUVALL WA
|
| This report describes the first operation of a CW directly diode- pumped optical parametric oscillator using periodically poled lithium niobate as a nonlinear medium. Degenerate oscillation of a doubly resonant device was successful. This device shows potential as a CW source in the near infrared region from 1.3 - 5 microns. |
|
| Compact Continuous Wave Tunable Infrared Lasers and Method. |
19 SEP 1996 |
31 pages |
| Authors:
William K. Burns; Lew Goldberg; Wayne McElhanon; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A bulk, quasi-periodic phase-matched difference-frequency (DFG) process in field-poled LiNbO3 bulk crystal permits continuous tunability of the output radiation in the 3.0-4.1 um wavelength range through grating rotation. DFG in QPM-LiNbO3 crystal, carried out using a Nd:YAG laser and a high power semiconductor laser at the quasi-phased matching (QPM) degeneracy point, results in an ultra wide 0.5 um acceptance bandwidth, permitting crystal rotation-free wavelength tuning of 4.0-4.5 um, with 0.2 ... |
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| Systematic Optimization of Second-Order Nonlinear Optical Materials |
02 SEP 96 |
18 pages |
| Authors:
Seth Marder; CALIFORNIA INST OF TECH PASADENA
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| Molecules that exhibit exceptionally large molecular nonlinearities have been identified. One of the molecules, when incorporated into a polycarbonate yield after electric field poling, has an electro-optic coefficient nearly twice that of lithium niobate when measured at a standard telecommunication wavelength. The molecules were based upon a heterocyclic acceptor with two strong electron withdrawing groups. This acceptor was examined in detail and the various molecules were synthesized to systematically study ... |
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| Common Control Module for Photonically Controlled Phased Arrays |
AUG 96 |
37 pages |
| Authors:
Walter Charczenko; Michael J. LaGasse; Suwat Thaniyavarn; BOEING DEFENSE AND SPACE GROUP SEATTLE WA
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| Photonic control of phased array antennas will allow fiber optic remoting of many antenna functions away from the front end of the antenna array. Integrated photonics is used to consolidate these operations onto a compact and low cost common module. The common module is independent of the frequency of operation of the antenna array. This program consisted of the design, development and demonstration of a 16-channel Integrated Phase and Amplitude ... |
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| An Investigation of the Channel Crosstalk in Optical Heterdyne Controlled Phased Array Radars. (Phenomenological Modeling of Optically Assisted Phased Array Radar) |
01 JUN 96 |
13 pages |
| Authors:
Alan R. Mickelson; COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| The principal objective of this project is to develop a calibrated simulation model which can accurately predict the effects on overall phased array system performance when conventional subsystems are replaced with optically assisted subsystems. The fabrication of high quality integrated optical components requires an accurate prediction of device performance. This is especially true in the fabrication of necessary components such as resonators where commercial software fails to predict the slot ... |
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| Guided-Wave Optoelectronics: Device Characterization, Analysis, and Design. International Symposium Proceedings Held in Brooklyn, NY on October 26 - 28, 1994 |
24 OCT 95 |
478 pages |
| Authors:
Theodor Tamir; Giora Griffel; Henry L. Bertoni; POLYTECHNIC UNIV BROOKLYN NY
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LITHIUM NIOBATES
