| Nanosecond and Subnanosecond Investigations of Intrinsic Optical Limiting Mechanisms in Photorefractive and Semiconducting Materials |
15 APR 96 |
120 pages |
| Authors:
Arthur L. Smirl; Thomas F. Boggess; IOWA UNIV IOWA CITY CENTER FOR LASER SCIENCE AND ENGINEERING
|
 | As a part of the ARPA Eye & Sensor Protection Program, this project has been focused on the exploration of a variety of optical nonlinearities in materials, including semiconductors, organometallic compounds, and photorefractive media, that have potential applications in optical limiting devices. Much of the progress on this project was previously reported in an Interim Final Report (Report # NV-93-C08). This report specifically summarizes progress made on the study of ... |
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| Advanced Processing of Nonlinear Optical Materials to Lower Pigtailing Cost, Reduce Optical Loss, and Reduce Drive Voltages in Devices |
12 APR 96 |
41 pages |
| Authors:
Robert V. Mustacich; RVM SCIENTIFIC INC SANTA BARBARA CA
|
| The feasibility investigation of advanced photoprocessing using multicolor lithography with NLO polymers is presented. Photoprocessing has previously been demonstrated using ultraviolet bleaching of NLO polymer films to define waveguides and gratings. This processing approach presented in this report is the first investigation of using the wavelength dependence of photoprocessing to control refractive index gradients in NLO polymer films. This approach makes possible for the first time the 3-dimensional control of ... |
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| Research Progress on Growth of UV Nonlinear Optical Borate Crystals |
APR 96 |
24 pages |
| Authors:
Tang Dingyuan; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| In this paper, a description of research advance on the growth of some important uv nonlinear optical crystals, such as BBO LBO and KBBF etc., which were first invented and developed by our institute during the past decade is given. The review consists of the following contents: the choice of method for the crystal growth; the technique of the crystal growth and the development; the choice of the flux; the ... |
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| Published Nonlinear Optical Uses of Zinc Germanium Diphosphide |
APR 96 |
38 pages |
| Authors:
Nils C. Fernelius; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| This report gives capsule summaries of all published work using the nonlinear optical properties of zinc germanium diphosphide (ZnGeP2). It is organized in several groupings-early American work, Russian, and recent Western work. A general bibliography is given as an appendix. |
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| Design, Synthesis and Characterization of Novel Nonlinear Optical Materials |
31 MAR 96 |
26 pages |
| Authors:
Paras N. Prasad; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
|
| The research accomplished in this project consists of four tasks each dealing with a different class of nonlinear optical (NLO) materials. Task (I): Second-order nonlinear optical materials. We developed new chromophores and processing to produce electro-optic materials with enhanced optical transparency towards the visible (>=700 nm), increased chemical and thermal stability and stability of poled alignment for 1000 hours at 100 deg C. Several approaches showed promises and we accomplished ... |
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| Materials For Second and Third Order Nonlinear Optical Applications |
05 FEB 96 |
30 pages |
| Authors:
Seth R. Marder; CALIFORNIA INST OF TECH PASADENA
|
| The work support by the AASERT award has accomplished the following. (1) It has resulted in the development of syntheses for useful precursors to nonlinear optical materials. In particular extended donor substituted aldehydes have been synthesized. (2) It has yielded new chromophores with large second order nonlinear optical properties. (3) It has explored the utility of synthesizing donor-acceptor substituted thiophene vinylene oligomers for second order nonlinear optical applications. (4) It ... |
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| Nonlinear Optical Interactions and Materials |
FEB 96 |
5 pages |
| Authors:
Robert W. Boyd; George L. Fisher; ROCHESTER UNIV NY
|
| Laboratory research has been performed to assess new materials for use in nonlinear optics. One aspect of this work involves the formation of composite materials. This work is motivated by recent theoretical predictions that composite materials can possess a nonlinear susceptibility exceeding those of its constituent materials. We verified this prediction by constructing a composite material formed of alternating layers of titanium dioxide and the conjugated polymer poly paraphenylene benzobisthiazole, ... |
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| Conference on Nonlinear Dynamics in Optical Systems (NDOS '95) Held in 5-7 Jun 1995 |
15 JAN 96 |
298 pages |
| Authors:
Govind P. Agrawal; ROCHESTER UNIV NY
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| Optical Switch Evaluation |
JAN 96 |
27 pages |
| Authors:
Joseph M. Osman; ROME LAB ROME NY
|
| We have evaluated nonlinear interface optical switches (NIOS) based on thin films of laser deposited metal oxide clusters. Films having nominal thickness 200nm and ranging in stoichiometry from WO2.6 to WO2.5, were evaluated in at least two configurations. Wanting to understand the considerable optical nonlinearity exhibited by these laser deposited group VI metal oxide cluster films, time resolved and other Raman experiments were conducted using WO3 powder. In addition to ... |
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| Nonlinear Optical Studies of Excitons in Semiconductor Heterostructures |
30 NOV 95 |
17 pages |
| Authors:
Duncan G. Steel; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Research on this program has focused on the study and application of the nonlinear response of GaAs and GaAs heterostructures. The work has resulted in the demonstration that the primary nonlinear optical response in GaAs is in fact not due to static interactions in the Hamiltonian (e.g., Coulomb, exchange, etc.), but rather due to strong dynamic exciton-exciton interactions, similar to resonance collisional broadening in dense gases. This so called excitation ... |
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| Mathematical Nonlinear Optics |
02 NOV 95 |
4 pages |
| Authors:
David W. McLaughlin; PRINCETON UNIV NJ PROGRAM IN APPLIED AND COMPUTATIONAL MATHEMATICS
|
| Mark Johnson's research during the past two years has addressed low- dimensional behavior in dynamical systems and dissipative partial differential equations specifically (1) Computation of 2-D Invariant Manifolds and (2) Low- Dimensional Dynamics in PDEs. His emphasis has been on scientific computing and the successful approximation of global dynamical phenomena. He has obtained preliminary results in several directions, including numerical and interactive representations of invariant manifolds and global bifurcation result ... |
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| Design and Synthesis of Interpenetrating Polymer Networks for Second- Order Nonlinear Optics |
26 OCT 95 |
22 pages |
| Authors:
Sutiyao Marturunkakul; Jeng-I Chen; Lian Li; Jayant Kumar; Sukant K. Tripathy; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| There has been a tremendous recent interest in the development of second-order nonlinear optical (NLO) polymeric materials for photonic applications. However, a major drawback of second-order NLO polymers that prevents them from being used in device applications is the instability of their electric field induced dipolar alignment. The randomization of the dipole orientation leads to the decay of second-order optical nonlinearities. Numerous efforts have been made to increase the stability ... |
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| High Performance Nonlinear Optical Polymers --Design and Synthesis of Side-Chain Polyquinolines |
12 OCT 95 |
12 pages |
| Authors:
Alex K-Y. Jen; Tian-An Chen; ENICHEM AMERICAN INC MONMOUTH JUNCTION NJ
|
| A novel class of second-order nonlinear optical (NLO) side-chain polymer: side-chain polyquinolines was developed. The synthetic approach includes the synthesis of chromophore precursor-containing bis(ketomethylene) monomers and bis(ortho-aminoketone) monomers, the polymerization of the two monomers, and post-tricyanovinylation to activate the side-chain chromophores of the poly- quinolines. The synthesized NLO side-chain polyquinolines possess high glass transition temperature, good thermal stability, and processibility. The testing results show that the NLO side-chain polyquinolines exhibit ... |
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| Special Technology Area Review on Nonlinear Optical Materials |
OCT 1995 |
18 pages |
| Authors:
Jr. MacCallum John M.; Thomas Hartwick; OFFICE OF THE UNDER SECRETARY OF DEFENSE (ACQUISITION) WASHINGTON DC ADVISORY GROUP ON ELECTRON DEVICES
|
| Military uses of nonlinear optical materials range from laser beamsteering and control of beam quality to eye-protection and guided-wave photonic devices and components. Materials for optical phase conjugating are important for correcting laser beam aberrations to near diffraction-limited beam quality, for combining a laser array into a single coherent beam and for imaging through atmospheric turbulence. Materials for eye-safe optical sources and electro-optic sensor and eye protection are also important ... |
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| (AASERT) Superconductors and Nonlinear Optical Materials Based on Molecular Guest-Host Systems |
25 SEP 95 |
5 pages |
| Authors:
Nabil M. Lawandy; BROWN UNIV PROVIDENCE RI
|
| The two main focus areas of research augmentation under the AASERT grant were: (1) Development of a maskies glass based patterning technology and (2) Development of a single step laser fabrication technology for making refractive microlenses. |
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| Methods and Components for Optical Contention Resolution in High-Speed Materials |
23 AUG 95 |
8 pages |
| Authors:
Paul Melman; Han Kim; GTE LABS INC WALTHAM MA
|
| A considerable effort has been put into the characterization of the Contention Resolution Optics (CR0) preprototype during this quarter. Of primary concern is the instability of the optical signal polarization as it progresses through the CR0. A series of tests were conducted to pin down the source of the polarization instability. A demo unit was received and has provided a much better insight into all of the polarization instability phenomena. ... |
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| Mathematical Nonlinear Optics |
AUG 95 |
17 pages |
| Authors:
David W. McLaughlin; PRINCETON UNIV NJ DEPT OF MATHEMATICS
|
| The principal investigator, together with a post-doctoral fellows Tetsuji Ueda and Xiao Wang, several graduate students, and colleagues, has applied the modern mathematical theory of nonlinear waves to problems in nonlinear optics and to equations directly relevant to nonlinear optics. Projects included (1) the interaction of laser light with nematic liquid crystals and (2) chaotic, homoclinic, small dispersive, and random behavior of solutions of the nonlinear Schroedinger equation. In project(1) ... |
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| The Synthesis, Characterization, and Photochemical Crosslinking of an NLO Epoxy Polymer |
20 JUN 95 |
17 pages |
| Authors:
Theodore Goodson; James M. Takaca; C. H. Wang; Lei Zhang; NEBRASKA UNIV LINCOLN DEPT OF CHEMISTRY
|
| A Photocrosslinkable second order nonlinear optical (NLO) epoxy polymer, BisphenolA-Nitroaminotolane, containing covalently attached cinnamate side chain substituents (BisA-NAT-CM), was synthesized. After corona poling second harmonic generation (SHG) is used to measure the relaxation of the an isotropy after the electric field is removed. Upon photolysis at 260 nm the cinnamoyl side chains undergo photochemical dimerization to crosslink the NLO polymer. Photobleaching is not a problem under these conditions. The photocrosslinked ... |
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| Poling Dynamics and Investigation into the Behavior of Trapped Charges in Poled Polymer Films for Nonlinear Optical Applications |
20 JUN 95 |
38 pages |
| Authors:
H. W. Guan; M. A. Pauley; C. H. Wang; NEBRASKA UNIV LINCOLN DEPT OF CHEMISTRY
|
| The behaviour of surface and trapped charges that originate during contact electric-field poling of a model guest-host nonlinearly active polymer has been investigated. Charge effects in this films of para-nitroaniline doped polymethylmethacrylate were studied during and after the poling process by simultaneous measurement of the current through the poling circuit and the SHG signal from the polymer system. The poling current present in a fresh sample is found to differ ... |
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| Optical Four-Wave Mixing in Laser Diodes for Logic Operations |
14 JUN 95 |
8 pages |
| Authors:
Pochi Yeh; CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The primary objective of this research has been to investigate optical logic operation; using nonlinear optical techniques in bulk media as well as in waveguide structures such a; fibers and/or laser diodes. We have been exploring, in general, optical logic gates that can be implemented utilizing spectral parallelism. This spectral parallelism has been demonstrated for various optical computing components. While most of these components demonstrated were, implemented in photorefractive media, ... |
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| Effective Non-Linear Refractive Index of Various Optical Materials |
JUN 95 |
37 pages |
| Authors:
John Malowicki; ROME LAB GRIFFISS AFB NY
|
| Photoinduced effective nonlinearity, n, of BSO crystal is measured by using a Z-scan method which is based on the self focusing defocusing effect. The Z-scan technique is a simple yet accurate way to measure n2. An optical limiter utilizing photo induced lensing is investigated and the influence of spatial self phase modulation for strong CW illumination is presented. |
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| Design, Synthesis and Characterization of Novel Nonlinear Optical Polymers |
31 MAY 95 |
32 pages |
| Authors:
Sukant Tripathy; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| The principal focus of the project is to develop new materials chemistry based on molecular level design and solid state chemistry. The goals have been to develop electroactive polymers with novel electronic, optical and nonlinear optical properties. Second and third order nonlinear optical materials have been developed based on conjugated macromolecules and asymmetric anharmonic molecular electronic dipolar oscillators. In this multidisciplinary research effort, starting from first principle, bulk self assembly ... |
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| Applied Nonlinear Optics for Sensor Protection |
31 MAY 95 |
193 pages |
| Authors:
Gregory J. Salamo; ARKANSAS UNIV FAYETTEVILLE DEPT OF PHYSICS
|
| The effort described here will concentrate on a dynamic passive device via photorefractive beam fanning. The device operates on the principle of dynamic gratings. In the formation of a dynamic grating the incoming laser radiation produces a modulation in the material index of refraction. The index modulation then acts as a real time phase grating and deflects, or scatters, the incident laser light. |
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| High Temperature Polymers for Second Order Nonlinear Optics: Photorefractive Polymides for Photonic Materials |
12 MAY 95 |
20 pages |
| Authors:
Hilary S. Lackritz; PURDUE UNIV LAFAYETTE IN SCHOOL OF CHEMICAL ENGINEERING
|
| We are examining a variety of novel high temperature stable polymers as new materials for second order nonlinear optical (NLO) device applications and modelling the rotational Brownian dynamics of chromophore orientation. Current polymers have sufficient optical signal generated by available chromophores, but are not practical for devices because of limitations in the temporal and thermal stability of the active chromophore orientation in the polymer matrix. This experimental and theoretical approach ... |
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| Relationship of the Second Order Nonlinear Optical Coefficient to Bandgap in Inorganic Non-Centrosymmetric Crystals |
MAY 95 |
31 pages |
| Authors:
A. G. Jackson; M. Ohmer; Steven R. LeClair; TECHNICAL MANAGEMENT CONCEPTS INC BEAVERCREEK OH
|
| Second order nonlinear optical coefficient data and band gap data collected from the literature have been classified and are organized by plotting their respective values. The two dimensional plots indicate that both large bandgap - and small X(2), and small bandgap - and large X(2) are highly correlated. A corresponding trend is also demonstrated for the figure of merit which is used to rank materials for wavelength conversion efficiency. Results ... |
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| Experimental Study of Nonlinear Periodic Structures |
MAY 95 |
67 pages |
| Authors:
Michelle S. Malcuitt; Christopher Herbert; Christy Heid; LEHIGH UNIV BETHLEHEM PA DEPT OF PHYSICS
|
| The optical properties of two examples of nonlinear periodic structures experimentally studied: colloidal crystals used as nonlinear distributed feedback structures and nonlinear volume holographic elements. The transmission of the colloidal crystals was found to be dramatically modified by an incident field whose frequency was tuned within or near the stop gap of the crystal. Optical limiting was observed when the frequency of the incident field was tuned to the high ... |
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| Molecular Motion of Phosphazene-Bound NLO Chromophores |
17 APR 95 |
38 pages |
| Authors:
Harry R. Allcock; Charles E. Cameron; Timothy W. Skloss; Sharon Taylor-Meyers; Kenneth J. Wynne; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY
|
| The behavior of NLO groups linked to a polyphosphazene chain was studied by solid state NMR spectroscopy. A series of poly(organophosphazenes) was prepared and characterized. Variable-temperature solid state 13C NMR spectra indicated that the use of a longer spacer group between the polymer backbone and the aromatic portion of the NLO side group lowered the temperature at which chromophore motion is quenched. This implied that the use of such structures ... |
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| Nonlinear Optical Composites of Metal Cluster Laden Polymers. |
11 APR 1995 |
|
| Authors:
Allan W. Olsen; Zakya H. Kafafi; DEPARTMENT OF THE NAVY WASHINGTON DC
|
 | Nonlinear optical composites with large third-order optical response composed of metal clusters uniformly dispersed in polymers are prepared by vapor deposition of a metal onto a cold support while simultaneously cocondensing a vapor of an organic material. Where the organic material is a monomer it polymerizes either when it comes in contact of the metal and/or when the cold surface is warmed. The unpolymerized monomer is removed to yield a ... |
|
| Coherent Cooperative Radiation Processes in Solids |
31 MAR 95 |
68 pages |
| Authors:
S. C. Rand; MICHIGAN UNIV ANN ARBOR DIV OF RESEARCH DEVELOPMENT AND ADMINISTRATION
|
| This program is intended to explore cooperative interactions among rare earth dopants in dielectric solids, with upconversion lasers and nonlinear optical applications in mind. The focus is on fundamental studies of multi- atom upconversion and avalanche processes rather than multiphoton upconversion for new short wavelength lasers. Because of significant potential applications in the areas of short wavelength sources, optical memories, communications, and displays it is important to improve our understanding ... |
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| Novel Unsymmetrical Polydiacetylenes as Materials for Second and Third Order Nonlinear Optics |
30 MAR 95 |
|
| Authors:
C. E. Masse; K. Vande Wiede; W. H. Kim; X. L. Jiang; J. Kumar; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| The objective of this investigation was to develop stable nonlinear optical (NLO) materials which possess both second and third order NLO properties. These materials were envisioned as having a polydiacetylene (PDA) backbone with a second order active NLO chromophoric substituent. The choice of a PDA backbone in this investigation was twofold. In terms of third order NLO properties, the extensive p-conjugation of the PDA backbone leads to large ultrafast third ... |
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| Applications of Organic and Polymer Nonlinear Optical Materials in Optics Computations |
27 MAR 95 |
21 pages |
| Authors:
Maocong Sun; Suling Ji; Chunfei Li; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| Organic and polymer nonlinear optical materials have good properties in optics, structure, and mechanics. At present, such materials are undergoing rapid development. This article emphasizes presenting some typical organic and polymer nonlinear optical materials, describes the optical bistability devices, optical power restraining units, spatial optical modulators, and optical waveguides fabricated from these materials. By comparing the organic crystals and semiconductor devices of the same categories, the article reports on the ... |
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| An Interpenetrating Polymer Network for Second-Order Nonlinear Optics |
23 MAR 95 |
18 pages |
| Authors:
L. Li; J. I. Chen; S. Marturunkakul; J. Kumar; S. K. Tripathy; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| The linear optical and second order nonlinear optical (NLO) properties of an interpenetrating polymer network (IPN) have been investigated. For the poled and cured IPN samples, large second order NLO coefficients, d33, were measured at 1.064 um and 1.542 um. The linear electrooptic coefficients, r33, were determined at various wavelengths. The poled and cured IPN samples showed no measurable decay of the second-order optical nonlinearity after being treated at 110 ... |
|
| ESF Study Center on Nonlinear Optics and Guided Waves, Edinburgh, 1-20 August 1994 |
13 MAR 95 |
25 pages |
| Authors:
D. F. Parker; EDINBURGH UNIV (UNITED KINGDOM)
|
| This report results from a contract tasking University of Edinburgh as follows: Provide three lists of topics to be covered at the nonlinear optics and guided waves as well as four copies of post-conference literature. |
|
| Photorefractive Nonlinear Optics |
02 MAR 95 |
24 pages |
| Authors:
Mark Cronin-Golomb; TUFTS UNIV MEDFORD MA ELECTRO-OPTICS TECHNOLOGY CENTER
|
| This research program resulted in the development of several new photorefractive devices, and an increase in basic understanding of photorefractive nonlinear interactions. We developed an interferometric phase conjugating ellipsometer which also led to a new highly accurate class of interferometer applicable to polarimetry and distance measurement. The effectiveness of photorefractive beam cleanup was investigated, and found to be most useful for highly aberrated beams. We investigated the feasibility of efficient ... |
|
| Characterizaticr of Solid State Laser and Nonlinear Optical Materials |
02 FEB 95 |
289 pages |
| Authors:
Jin-Joo Song; OKLAHOMA STATE UNIV STILLWATER CENTER FOR LASER RESEARCH
|
| Optical properties of materials having applications in solid state laser systems were investigated. The work was divided into two areas based on the materials useful in the different methods for obtaining frequency agility: narrow line emitters with multiple lasing channels and nonlinear optical materials. In the first category the spectral dynamics and lasing properties of a variety of materials such as fluoride and oxide crystals and glasses codoped with two ... |
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| Photorefractive Mode Conversion for Fault-Tolerant Source-Fiber Coupling |
14 JAN 95 |
74 pages |
| Authors:
Arthur E. Chiou; ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
|
| The purpose of this contract to study the potential applications of nonlinear optical phenomena in photorefractive materials in various geometries (such as waveguides, fibers, and bulks) for efficient and fault-tolerant laser- to-fiber coupling. The study focuses on the development of new application concepts, theoretical modeling and experimental demonstration/characterization of novel devices based on energy coupling among different optical modes via dynamic holograms in c-axis photorefractive waveguides and fibers; and on ... |
|
| Infrastructure Enhancement for Research |
14 JAN 95 |
5 pages |
| Authors:
Merritt C. Helvenston; NEW MEXICO HIGHLAND UNIV LAS VEGAS
|
| Research equipment was purchased under this grant to improve New Mexico Highlands University's ability to compete for DoD research funding. The equipment was for chemical analysis and photophysics which included Gc/Ms, Lc/ Ms, FTIR, single crystal X-ray diffractometer, workstation and software for quantum mechanical calculations and a regenerative amplifier for picosecond laser studies. Work of DoD interest supported by the equipment is development of nonlinear optical materials, optical limiting and ... |
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| Effect of Molecular Structure on the Electrooptic Performance of Electroclinic Liquid Crystals |
1995 |
10 pages |
| Authors:
G. P. Crawford; J. Naciri; R. Shashidhar; P. Keller; B. R. Ratna; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR BIOMOLECULAR SCIENCE AND ENGINEERING
|
| The correlation between molecular structure and electrooptic performance is studied for novel room temperature chiral smectic A liquid crystals. It is observed that slight modifications of the hydrocarbon chain connected to the chiral center result in dramatic differences in their electrooptic performance. If the hydrocarbon chain is shortened or if a double bond is localized at the end of the hydrocarbon chain, the tilt angle, ... |
|
| Special Session on Adaptive Optics in Russia and China. Volume 23 |
1995 |
|
| Authors:
OPTICAL SOCIETY OF AMERICA WASHINGTON DC
|
| The report documents the summaries of the papers presented at the topical meeting on Adaptive Optics held 2-6 October 1995 in Garching, Germany. The purpose of the present report was to address both basic and applied research issues regarding science and technology with particular attention to nonlinear optics, imaging, adaptive optics and computational methods. |
|
| Materials Physics - Work Unit 2300/FF/05 |
95 |
107 pages |
| Authors:
Peter M. Ranon; FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO
|
| This task addressed basic research to better understand laser ablation deposition of thin films, nonlinear optical (NLO) effects in poled quartz, and the waveguiding properties of Ge doped silica planar waveguides. These efforts expanded the understanding of the interaction between light and matter and thus advanced the envelope of the technology base of NLO materials used in optical device applications. Research directly supported Air Force Objectives for Optoelectronic Materials, as ... |
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| Growth and Evaluation of Nonlinear Optical Crystals for Laser Applications: Lithium Borate, Barium Borate and Silver Gallium Selenide |
08 DEC 94 |
96 pages |
| Authors:
Robert S. Feigelson; Roger K. Route; STANFORD UNIV CA CENTER FOR MATERIALS RESEARCH
|
| This report summarizes a four year program on the development of high efficiency nonlinear optical materials. Major achievements were the development of effective top-seeded solution growth techniques for beta-barium borate (BBO) and lithium triborate (LBO). BBO crystals were also grown for the first time in the US by the direct melt growth technique, a metastable method that leads to significantly higher growth rates than the commercial solution-growth technique. High quality ... |
|
| Pulse Propagation in Nonlinear Optical Fibers Using Phase-Sensitive Amplifiers |
DEC 94 |
141 pages |
| Authors:
Jose N. Kutz; NORTHWESTERN UNIV EVANSTON IL
|
| A mathematical model for pulse propagation in a nonlinear fiber optic communications line is presented where linear loss in the fiber is balanced by a chain of periodically spaced, Phase Sensitive Amplifiers (PSAs). A multiple scale analysis is employed to average over the strong, rapidly varying and periodic perturbations to the governing nonlinear Schroedinger equation (NLS). The analysis indicates that the averaged evolution is governed by a fourth order nonlinear ... |
|
| Optical Phase Conjugation, Beam Coupling, and Effects of Color Centers in Photorefractive Crystals |
DEC 94 |
185 pages |
| Authors:
Putcha Venkateswarlu; Mehdi Moghbel; Medury D. Sastry; Michael Curley; ALABAMA A AND M UNIV NORMAL DEPT OF PHYSICS
|
| This effort was a research program to investigate the (coherent and incoherent) nonlinear optical properties as a function of color centers. The investigation included multiwave mixing (four wave mixing and phase conjugation) , spectral, and electron paramagnetic resonance properties of gamma-ray induced color centers. Investigations on BaTiO3 include EPR measurement parametric dependence of energy transfer for two coherent beams, influence of Fe and Cu impurities on the origin of photorefractive ... |
|
| Pulse Propagation in Nonlinear Optical Fibers using Phase-Sensitive Amplifiers |
DEC 1994 |
142 pages |
| Authors:
Jose N. Kutz; AIR FORCE RESEARCH LAB BOLLING AFB DC
|
| A mathematical model for pulse propagation in a nonlinear fiber-optic communications line is presented where linear loss in the fiber is balanced by a chain of periodically-spaced, phase-sensitive amplifiers (PSAs). A multiple scale analysis is employed to average over the strong, rapidly-varying and periodic perturbations to the governing nonlinear Schrodinger equation (NLS). The analysis indicates that the averaged evolution is governed by a fourth-order nonlinear diffusion equation which evolves on ... |
|
| Phase Conjugate Propagation Study |
OCT 94 |
59 pages |
| Authors:
G. J. Dunning; M. L. Minden; D. M. Pepper; C. Oh; K. T. Andrews; HUGHES AIRCRAFT CO MALIBU CA
|
| This study addresses two issues that relate to optical communication systems over a propagation path that includes an ensemble of randomly distributed dynamically moving scattering sites. One issue pertains to the reduction of off axis scattering experienced by a probe beam of light that propagates from a remote sensor to an interrogator over the path. A second issue involves the sensing and quantification of any global motion of the scattering ... |
|
| Materials for High-Power Laser Applications: Point Defects in KTP and ZnGeP2 |
30 SEP 94 |
54 pages |
| Authors:
Larry E. Halliburton; WEST VIRGINIA UNIV MORGANTOWN DEPT OF PHYSICS
|
| The operation of devices utilizing nonlinear optical materials such as KTP and ZnGeP2 are limited at high laser power by point defects in the crystal. This project has used electron paramagnetic resonance (EPR) and electron nuclear double resonance (ENDOR) experimental techniques to identify and characterize the primary point defects in KTP, ZnGeP2, and CdGeAs2 crystals. In KTP, the primary electron trap (i.e., a Ti3+ ion) is associated with the formation ... |
|
| Novel Materials and Devices from Self-Assembled Periodic Structures |
30 SEP 94 |
52 pages |
| Authors:
Sanford A. Asher; PITTSBURGH UNIV PA DEPT OF CHEMISTRY
|
| The purpose of this work is to develop highly optically nonlinear CdS quantum dot-SiO2 sphere composites useful for optical switching. The concept is to use these spheres in a BCC array formed from crystalline colloidal arrays. The spheres would normally be refractive index matched to the medium and light would freely transmit. At high light intensities the refractive index of the nonlinear spheres would diverge from the medium and the ... |
|
| Nonlinear Optical Processes in Polymer Films |
29 SEP 94 |
13 pages |
| Authors:
Anthony F. Garito; PENNSYLVANIA UNIV PHILADELPHIA DEPT OF PHYSICS
|
| Electrooptic organic polymer thin films show great promise for applications in integrated optoelectronic devices. These materials are usually formed as guest-host polymer systems that exhibit large second order nonlinear optical coefficients, low DC and microwave dielectric constants, and broad optical transparency ranges. The major obstacle to the development of practical polymer optoelectronic devices has been the thermal stability of the electrooptic coefficients of the guest-host polymer films. Current research has ... |
|
| Passive Spatial Beam Control. Appendix |
29 SEP 94 |
434 pages |
| Authors:
Eric W. VanStryland; UNIVERSITY OF CENTRAL FLORIDA ORLANDO CENTER FOR RESEARCH IN ELECTRO-OPTICS A ND LASERS
|
|
| Development of Device Quality Nonlinear Optical Materials and Definition of Mechanisms of Optical Nonlinearity |
01 SEP 94 |
104 pages |
| Authors:
Larry R. Dalton; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CHEMISTRY
|
| The following obJectives were defined and pursued: (1) Synthesis of chromophores characterized by large hyperpolarizability and good thermal stability, (2) covalent coupling of nonlinear optical chromophores to polymer matrices, (3) lattice hardening reactions which permit locking-in of electric field poling-induced macroscopic noncentrosymmetric order, (4) definition of mechanisms of optical nonlinearity and development of improved instrumentation to effect such characterization, (5) exploration of methods of enhancing optical nonlinearity and electromagnetic field ... |
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Reports by Keyword(s)
*NONLINEAR OPTICS
