| TCP Performance over ACTS |
1995 |
14 pages |
| Authors:
C. E. Fair; NATIONAL CENTER FOR ATMOSPHERIC RESEARCH BOULDER CO
|
 | Coupled atmospheric and hydrodynamic forecast models were executed on supercomputing resources of the National Center for Atmospheric Research (NCAR) in Boulder, Colorado and the Ohio Supercomputing Center (OSC) in Columbus, Ohio respectively. The interoperation of these two models on distributed, high performance computing platforms required the transfer of large three dimensional data sets at very high in formation rates. High capacity terrestrial fiber optic transmission system technologies ... |
|
| Annual Report for Contract N00014-93-1-0116 (New Mexico University, Albuquerque) |
23 DEC 94 |
3 pages |
| Authors:
Carlton M. Caves; NEW MEXICO UNIV ALBUQUERQUE DEPT OF PHYSICS AND ASTRONOMY
|
|
| Applied Optics Laboratory |
22 DEC 94 |
9 pages |
| Authors:
Guoguang Tian; Daheng Wang; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| The major directions of research of this lab will be transport, transformation, processing, receiving and display of information in modern optics, optical calculation and optical processing of non-optical signals. Main research contents include the following: (1) Optical design and image quality evaluation; (2) Optical super-fine processing and measurement technology; (3) Optical calculation technology; (4) Imaging spectral technology; (5) Color vision and robot vision; (6) Optical information processing and holographic interference ... |
|
| High Resolution Direct Digizitation and Optical Telemetry of Shipboard Antenna Signals |
19 DEC 94 |
46 pages |
| Authors:
Phillip E. Pace; Ronald J. Pieper; John P. Powers; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEE RING
|
| This report describes the past year's research efforts (October 1993- September 1994) in the design, development and construction of an optical processing system to directly digitize and transport shipboard antenna signals to below deck. The electro-optical guided wave analog-to-digital converter directly digitizes the antenna signals and is based on preprocessing the signals with a symmetrical number system (SNS) to achieve both an 8-bit design and a 14- bit design. The ... |
|
| Passive, Multi-Channel Fiber Optic Rotary Joint Assembly. |
06 DEC 1994 |
|
| Authors:
Gregory H. Ames; Roger L. Morency; DEPARTMENT OF THE NAVY WASHINGTON DC
|
 | A passive multi-channel optical fiber rotary joint couples optical fiber communication channels via axially bilaterally symmetrically disposed lens housings, or array pieces, for receiving miniature-collimation-lenses to one and the other sides of an image-derotation-prism and prism-rotational-drive-subassembly including an image derotation prism which rotates at a predetermined ratio of the relative rotation of the array pieces. This establishes transverse pseudo-planar rotary interfaces respectively between the one and another array piece ... |
|
| 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 ... |
|
| Linewidth-Insensitive Coherent Analog Optical Links |
DEC 94 |
245 pages |
| Authors:
L. G. Kazovsky; J. Pan; T. K. Fong; R. F. Kalman; D. J. Sabido; STANFORD UNIV CA DEPT OF ELECTRICAL ENGINEERING
|
| This program has analyzed the performance of four classes of links as quantified by spurious-free dynamic range (SFDR), RF power transfer ratio and noise figure, and compared them to conventional detection links. The four classes analyzed were coherent links, optically amplified links, angle modulated links, and combinations of these. Experimental validation of the analysis was accomplished at 2 GHz and is described. The linewidth-insensitive operation in all cases using both ... |
|
| 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 ... |
|
| Fiber Optic Reference Frequency Distribution to Remote Beam Waveguide Antennas |
Dec-1994 |
13 pages |
| Authors:
Malcolm Calhoun; Paul Kuhnle; Julius Law; CALIFORNIA INST OF TECHNOLOGY PASADENA JET PROPULSION LAB
|
| In the NASA/JPL Deep Space Network (DSN), radio science experiments (probing outer planet atmospheres, rings, gravitational waves, etc.) and very long-base interferometry (VLBI) require ultra-stable, low phrase noise reference frequency signals at the user locations. Typical locations for radio science/VLBI exciters and down-converters are the cone areas of the 34 m high efficiency antennas or the 70 m antennas, located several hundred meters from the reference frequency standards. Over the ... |
|
| Modulation Effect of a Bragg Acousto-Optic Bistable System |
10 NOV 94 |
14 pages |
| Authors:
Zhiren Zheng; Jinyue Gao; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| In this paper, the linear stability and the modulation effect of a Bragg acousto-optic bistable systems are analyzed. According to the dynamic and stationary equations describing the system, the boundary for instability has been calculated. When the input intensity undergoes a sinusoidal modulation, we predict the resonance and shift of resonance peak of the output intensity in the stable region and the appearance of frequency looping phenomena in the unstable ... |
|
| A Novel Optic Bistable Device with Very Low Threshold Intensity Using Photorefractive Films |
13 AUG 94 |
25 pages |
| Authors:
Sean X. Wang; Yuankun Sun; Sudhir B. Trivedi; Guifang Li; BRIMROSE CORP OF AMERICA BALTIMORE MD
|
| Brimrose Corporation of America reports the successful completion of the SBIR Phase I research in low-threshold intensity optical bistable devices using photorefractive nonlinearity. A thin photorefractive film optical bistable device was proposed in the Phase I proposal. The feasibility of this device was theoretically investigated. The theoretical feasibility study formulates the materials requirements in such a kind of configuration for Phase II research. In addition, we have proposed and investigated ... |
|
| GaAs Optical Circuits |
AUG 94 |
43 pages |
| Authors:
Michael A. Parker; J. S. Kimmet; S. I. Libby; P. D. Swanson; ROME LAB GRIFFISS AFB NY
|
| This report presents two new smart pixels for use in optical computing and communications. These devices are Configurable Optical Gates (COGs) that form the Diode Laser Logic (DLL) family and Spontaneous Emission Filtered Laser Amplifiers (SEFLA). DLL is a complete, new logic family comprised of Q-switched lasers and photodetectors. The lasers and detectors are monolithically integrated on multiple quantum well laser heterostructure with semi-insulating substrates. Preliminary results indicate an ON/OFF ... |
|
| The Throughput of Wavelength Routing Networks |
AUG 1994 |
3 pages |
| Authors:
Richard A. Barry; Pierre A. Humblet; MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INFORMATION AND DECISION SYSTEMS
|
| We consider the problem of interconnecting N local area networks (LANs) through a wavelength routing all optical network (wavelength-routing AON) supporting F wavelengths at R b/s per wavelength. A wavelength-routing AON is one in which the path of a signal is a function only of the signal wavelength and the origin of the signal. We allow the possibility of wavelength changing so that a signal may arrive at a destination ... |
|
| Acousto-Optic Beam Steering Study |
AUG 1994 |
141 pages |
| Authors:
H. W. Presley; L. M. Burberry; A. F. Abbenante; HARRIS CORP MELBOURNE FL GOVERNMENT AEROSPACE SYSTEMS DIV
|
| This is the final report for a 21 month study investigating the use of acoustic-optic beam steering for inter-satellite laser communications (lasercom). The basic technique is demonstrated in a breadboard that uses a customized 2-dimensional acoustic-optic Bragg cell deflector and a magnifying optical system comprised entirely of off-the-shelf components. The breadboard was designed to steer a laser over a range of 360 x 36 degrees. Important characteristics of the acoustic-optic ... |
|
| Mega-Scale Simulation of Multi-Layer Devices-- Formulation, Kinetics, and Visualization |
28 JUL 94 |
97 pages |
| Authors:
Robert W. Dutton; STANFORD UNIV CA
|
| A new energy transport model including both carrier and lattice temperatures has been developed and implemented in PISCES 2Er. Major capabilities in physical models for compound semiconductor devices include: heterojunction interfaces, deep level trapping and new mobility models. Applications of PISCES 2Er in the modeling of GaAs MESFET sidegating and electronic effects in light-emitting structures have been achieved. The GaAs MESFET modeling of dc and ac effects have been confirmed ... |
|
| Resonant Tunneling Quantum Well Integrated Optical Waveguide MOdulator/ Switch |
JUL 94 |
33 pages |
| Authors:
Andrew Kostrzewski; PHYSICAL OPTICS CORP TORRANCE CA APPLIED TECHNOLOGY DIV
|
| In this Phase I program, Physical Optics Corporation (POC) has investigated resonant tunneling double barrier quantum wells (RTDBQW) for application to all-optical communication networks. The RTDBQW) can be used as a building block in superfast SONET/ATM network. The proposed concept relies on the integration of an optical guided wave modulator with the RTDBQW. Several waveguide modulator architectures have been investigated, including Mach-Zehnder directional couplers. A Mach-Zehnder interferometer has been selected ... |
|
| The Advanced Telecommunications Research Institute (ATR) |
16 MAY 94 |
7 pages |
| Authors:
T. Davis; ASIAN OFFICE OF AEROSPACE RESEARCH AND DEVELOPMENT APO AP 96337-0007
|
| A review of the organization and research program of the Advanced Telecommunications Research Institute (ATR), located in the Kansai Science City near Kyoto, Japan, is presented. This review is based upon information obtained during a 16 May 1994 visit to ATR, and includes a brief description of the current research focus of each of the four active research divisions. Also included is a review of a representative ATR research project, ... |
|
| Optoelectric Technology Roadmap: Conclusions and Recommendations |
01 MAY 94 |
62 pages |
| Authors:
Ron Nelson; OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION MOUNTAIN VIEW CA
|
| This report sets forth the major recommendations of the Optoelectronics Industry Development Association (OIDA) to improve the competitiveness of North American optoelectronics industry. The report summarizes an effort to determine the greatest market opportunities and key technical barriers, and to identify the highest priorities for improving the competitiveness of the industry. |
|
| Atomic Line Filter for SDI Applications |
13 APR 94 |
70 pages |
| Authors:
Jim Menders; S. H. Bloom; Eric Korevaar; M. Rivers; C. S. Liu; THERMOTREX CORP SAN DIEGO CA
|
| When optical signals are embedded in background noise, narrowband optical filters are needed for receivers to achieve quantum limited performance. Such is typically the case with daytime optical communications and lidar. Narrowband filtered detectors. with acceptance bands of just a few picometers (pm) and high out of band rejection are well suited for these applications. The main thrust of this program has been the development of two means for narrowband ... |
|
| Photonic Fast Packet Switching Using Optically Processed Control |
MAR 94 |
35 pages |
| Authors:
Paul R. Prucnal; PRINCETON UNIV NJ DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| In this research program, we have studied architectural and performance modeling issues which are central to the development of high-speed optical networks. We have focussed primarily on the architecture of a broadband photonic packet switch. The use of optical processing to perform switch routing functions permits real-time routing of packets at high speed. The architecture of a 2x2 photonic packet switching node using optically-processed fixed- directory routing, contention resolution (using ... |
|
| Control and Reliability of Optical Networks in Multiprocessors |
22 DEC 93 |
|
| Authors:
James J. Olsen; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| Optical communication links have great potential to improve the performance of interconnection networks within large parallel multiprocessors, but semiconductor laser drive control and reliability problems inhibit their wide use. This report describes a number of system-level solutions to these problems. The solutions are simple and inexpensive enough to be practical for implementation in the thousands of optical links that might be used in a multiprocessor. Semiconductor laser reliability problems are ... |
|
| System Design Analysis of a Lightweight Laser Satellite Terminal |
DEC 93 |
81 pages |
| Authors:
Brian C. Page; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| This study investigated the technological feasibility of a man- portable satellite laser communications system. Areas of interest were: an end- to-end system analysis on the communications link; evaluation of atmospheric effects; and evaluation of semi-conductor lasers as the laser source. A literature search revealed that satellite laser communication research is primarily directed at inter-satellite links. There have been some proposed systems for space-to-ground laser communications systems, but they all utilize ... |
|
| ARO-URI Center for Opto-Electronic Systems Research Fellowship Grant |
DEC 93 |
51 pages |
| Authors:
Nicholas George; ROCHESTER UNIV NY INST OF OPTICS
|
| Through the establishment of the ARO-URI Center for Opto-Electronic Systems Research in The Institute of Optics of the University of Rochester and the subject grant, we have supported the fellowship program of 38 Ph.D. scholars. The key research interests have been in the areas of lasers, optical system design, signal processing, remote sensing, source analysis, integrated optics, and diffraction and propagation theory. The majority of these exceptional scholars have completed ... |
|
| Pulse-Splitting and AM-FM Conversion in a Nonlinear Dispersive Medium |
DEC 93 |
74 pages |
| Authors:
William F. Coleman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Experimental and theoretical results are presented for nonlinear dispersive waveguide modes in an acoustic duct. We report observations of a localized envelope which splits into two disturbances moving with two different velocities of propagation. As a consequence, we predict that if a signal is amplitude modulated at the source, spatial beating between the two disturbances will occur, and at periodic positions in space the signal will become frequency modulated. These ... |
|
| Transporting Video Teleconferencing Traffic |
DEC 93 |
140 pages |
| Authors:
Stephen Perschau; DELTA INFORMATION SYSTEMS INC HORSHAM PA
|
| The purpose of this document is to summarize the work accomplished on Sub task 4 (Transporting Video Teleconferencing Traffic) of Task 2 (Technical Work in the Area of Videoconferencing) of this contract. The purpose of this subtask was to study alternative media for transporting video teleconferencing traffic. In the first step of the project basic transport media (as opposed to Alternative Media) which are commonly used for video conferencing were ... |
|
| Design of a Shared Coherent Cache for a Multiple Channel Architecture |
DEC 93 |
112 pages |
| Authors:
John A. Reisner; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| The Multiple Channel Architecture (MCA) is a recently proposed computer architecture which uses fiber optic communications to overcome many of the problems associated with interconnection networks. There exists a detailed MCA simulator which faithfully simulates an MCA system, however, the original version of the simulator did not cache shared data. In order to improve the performance of the MCA, a cache coherency protocol was developed and implemented in the simulator. ... |
|
| Proceedings of the International Wire and Cable Symposium Held in St. Louis, Missouri on 15-18 November 1993 |
18 NOV 93 |
905 pages |
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS COMMAND FORT MONMOUTH NJ
|
|
| Modeling, Analysis, and Simulation of an Optical Time-Division Multiple- Access Network Architecture |
NOV 93 |
52 pages |
| Authors:
Michael Devetsikiotis; Quing G. Zhou; Gavin R. Cato; J. K. Townsend; Robert M. Kolbas; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF ELECTRICAL AND COMPUTER ENGINEERI NG
|
| An optical time-division multiple-access (OTDMA) network architecture has been proposed which has the potential of avoiding electronic processing of signals at the aggregate network bandwidth. New specifications for the optical components used in this OTDMA network architecture will be required before a practical system is realized. In this report, we present a model of the OTDMA architecture that relates parameters at the device level such as carrier mobility, physical geometry, ... |
|
| Program of the 1993 Interdisciplinary Laser Science Conference (9th) (ILS-1X) (1993 Annual Meeting of the APS Laser Topical Group, Held Jointly with the 1993 Annual Meeting of the Optical Society of America, in Toronto, Canada on 3-8 October 1993) |
OCT 93 |
|
| Authors:
N. Peyghambarian; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The 1993 Interdisciplinary Laser Science (ILS) Conference-to be held 3-8 October 1993 in Toronto, Canada, at the Metro Toronto Convention Center-is the ninth in the ILS Conference Series. The series was established to survey the core laser-science areas, including lasers and their properties, nonlinear- optical properties of materials and devices, applications of lasers in physics and chemistry, and a selection of laser applications in other areas of science and technology. ... |
|
| Accordion-Like Polymers for Nonlinear Applications. |
21 SEP 1993 |
|
| Authors:
John D. Stenger-Smith; Ronald Henry; James Hoover; Geoffrey Lindsay; John Fischer; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The present invention discloses new polymers which can assume an accordion-like conformation of the backbone. These polymers are prepared by the copolymerization of two difunctional, chemically precoupled precursors to chromophoric units. The resulting polymers have a head-to-head, tail-to-tail topology (a syndioregic arrangement of rigid units along the polymer backbone), and the molecular units are designed to fold into an accordion conformation. This useful microstructure (a three-dimensional conformation) forms spontaneously (self-assembles); ... |
|
| Competitive Dynamics and Self-Organization in Photorefractive Systems |
01 SEP 93 |
20 pages |
| Authors:
Dana Z. Anderson; COLORADO UNIV AT BOULDER DEPT OF ASTROPHYSICAL SCIENCE
|
| Information can be manipulated and processed by a nonlinear dynamical system. This work investigates the properties of such nonlinear optical systems based upon real-time holographic materials known as photorefractive media. Our goal is to understand how and when a dynamical system can self-organize, or learn on its own to process information in a useful way. We have demonstrated systems, for example, that can separate multiple fiber optic communication channels or ... |
|
| Crosstalk Analysis of Synchronous and Asynchronous Optical Chip Interconnects with Direct Detection |
SEP 93 |
96 pages |
| Authors:
Rena M. Loesch; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis provides a crosstalk analysis of optical chip interconnects via single-mode waveguides with synchronous transmission and asynchronous transmission. This crosstalk model is general and can be used for any type of waveguide network. Three cases of laser sources will be considered: (1) each channel operates with an independent laser sources, (2) all laser sources have the same mean wavelength but with different phase noise processes, and (3) all laser ... |
|
| Wide Bandwidth Differential Amplifier. |
10 AUG 1993 |
|
| Authors:
Mark H. Berry; Debra J. Gookin; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A differential amplifier for gigahertz bandwidth electrical signals using fiber optics and integrated optical devices has a differential gain which is a function of the electrical to optical and optical to electrical conversion factors. The common mode rejection ratio of the differential amplifier at 1 GHz was greater than 30 dB and the common mode rejection ratio depended on the time difference between the differential amplifier inputs. A differential amplifier ... |
|
| Optical Frequency Division Using an Optical Parametric Oscillator |
09 AUG 93 |
14 pages |
| Authors:
Ngai C. Wong; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| We have pursued a vigorous program of experimental and theoretical research on a novel method of frequency division based on an optical parametric oscillator (OPO). We have successfully demonstrated optical frequency division in a nearly degenerate KTP OPO that is highly efficient and tunable. The difference frequency of the two subharmonic outputs of the OPO was phase locked to a 12-GHz microwave source with a residual phase noise spectral density ... |
|
| Study of Electromagnetic Wave Scattering from Characterized Rough Surfaces |
04 AUG 93 |
80 pages |
| Authors:
Kevin A. O'Donnell; GEORGIA INST OF TECH ATLANTA SCHOOL OF PHYSICS
|
| In our experimental and theoretical research during our ARO grant, we have studied the optical scattering properties of rough conducting surfaces that have structure comparable to or slightly greater than the illumination wavelength. We theoretically and experimentally studied the diffuse scatter for surfaces with one-dimensional roughness, where we have seen backscattering enhancement and strong polarization effects. In the angular correlation functions associated with the scattered light, we clearly see the ... |
|
| International Conference on Optical Amplifiers and their Applications Held at Yokohama, Japan on 4-6 July 1993 |
06 JUL 93 |
7 pages |
| Authors:
S. J. Yakura; ASIAN OFFICE OF AEROSPACE RESEARCH AND DEVELOPMENT APO AP 96337-0007
|
|
| Congestion Control of High-Speed Networks |
30 JUN 93 |
5 pages |
| Authors:
COLUMBIA UNIV NEW YORK
|
| We report on four areas of activity in the past six months. These include, (1) work on the control of integrated video and image traffic, both at the access to a network, and within a high-speed network; (2) more general/game theoretic models for flow control in networks; (3) work on fault management for high-speed heterogeneous networks to improve survivability; (4) work on all- optical (lightwave) networks of the future, designed ... |
|
| Fraunhofer Line Laser Transmitting System. |
22 JUN 1993 |
|
| Authors:
Gregory L. Adams; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A system is provided for generating a blue-green optical signal with a wavelength in the range of 450-550 nm and corresponding to a Fraunhofer line, comprising: a plurality of laser diodes, each laser diode generating a first optical signal having a first wavelength, Lambda; a plurality of optical fiber, each optical fiber having a first end optically coupled to receive the optical signal from one of the laser diodes and ... |
|
| Proceedings of the Annual Meeting (16th) and the 20th Day of Scientific Lectures of the National Society of Black Physicists Held in Tallahassee, Florida on April 21 - 24, 1993 |
24 APR 93 |
143 pages |
| Authors:
Ronald L. Williams; Charles Weatherford; FLORIDA AGRICULTURAL AND MECHANICAL UNIV TALLAHASSEE
|
|
| New Schemes for Predictive Congestion Control |
APR 1993 |
44 pages |
| Authors:
Bevan N. Das; ILLINOIS UNIV AT URBANA COORDINATED SCIENCE LAB
|
| The Predictive Congestion Control framework, as proposed by Ko, Mishra, and Tripathi, applies to high-speed, wide-area communication networks. The central assumption of the framework is that the link propagation delay, a deterministic quantity depending on fiber length, dominates all other types of delay in the networks. Within the framework, the authors developed four schemes, the static, optimistic, pessimistic, and heuristic, which are summarized here. This thesis presents two new schemes ... |
|
| Optical Design for Photonics. Organization of the 1993 Photonics Science Topical Meetings Held in Palm Springs, California on March 22 - 24, 1993. Technical Digest Series, Volume 9 |
24 MAR 93 |
226 pages |
| Authors:
Jarus W. Quinn; OPTICAL SOCIETY OF AMERICA WASHINGTON DC
|
| This symposia discussed the following topics: (1) Advanced lasers; (2) Plasma waveguides; (3) Fundamental interactions in atoms/plasmas; (4) Hot electron generation in dense plasmas; (5) Generation and application of short wavelength sources; (6) X-ray lasers; (7) Short pulse x-rays; (8) Propagation effects; (9) Fundamental interactions; and (10) High harmonic |
|
| Planar Active Antennas and Quasi-Optical Power Combining Arrays Using FET's and Slots |
20 MAR 93 |
161 pages |
| Authors:
Shigeo Kawasaki; Tatsuo Itoh; CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
|
| This report presents design concepts and experimental data of planar active antenna and quasi-optical power combining arrays with strong coupling to realize a compact and low-cost radar and communication system. The prototype circuits for this purpose were made in a layered configuration using microstrip lines and in a uniplanar structure using CPW's. As an active source, an FET was selected. As a unit cell of the power combining array, a ... |
|
| The Three-Dimensional Ray Trajectories of The WKB Optical Fiber Modes |
MAR 93 |
102 pages |
| Authors:
Athanasios Nassopoulos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A model that produces three-dimensional ray trajectories in an optical fiber is derived through the use of a simple correspondence rule. The analysis and simulations presented will be in terms of dimensionless parameters. The curves prepared are presented for allowed radial and azimuthal mode numbers and are presented in terms of dimensions which are normalized by the core radius. The model presented will be shown to be in agreement with ... |
|
| Electro-Optic Characterisation of Extremely Wide Bandwidth Electrical Signals |
FEB 93 |
43 pages |
| Authors:
A. C. Lindsay; G. A. Knight; S. C. Troedson; I. G. Fuss; ELECTRONICS RESEARCH LAB ADELAIDE (AUSTRALIA)
|
| In this report an ultrafast electro-optic sampling system suitable for applications such as device characterisation is described. The aperture time of the sampler is calculated to be about 290 fs, implying an attainable device bandwidth in excess of 300 GHz. The sampler was characterised using a test pulse with approximately 12 GHz of frequency content, and the results compared to those obtained from an 18 GHz digital sampling oscilloscope. Signal ... |
|
| Atmospheric Transverse Coherence Length Measurement System for Laser Communications |
FEB 93 |
54 pages |
| Authors:
Gary D. Wilkins; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| This paper summarizes the Wright laboratory In-House Laboratory Independent Research (ILIR) conducted to determine the feasibility of using inherent information, such as angle-of-arrival fluctuations of incident radiation and spreading of the focused spot size, obtained through the measurement of the diffraction limited aperture of the atmosphere, (ro) to adaptively optimize laser communications system parameters. |
|
| Final Report for Contract N00014-91-J-1167 (University of Southern California, Los Angles) |
14 JAN 93 |
5 pages |
| Authors:
Carlton M. Caves; NEW MEXICO UNIV ALBUQUERQUE DEPT OF PHYSICS AND ASTRONOMY
|
|
| The Rome Laboratory Journal 1993 |
93 |
|
| Authors:
ROME LAB GRIFFISS AFB NY
|
|
| United States Air Force Summer Research Program 1992 (SFRP). Summer Research Extension Program Final Reports. Volume 3. Rome Laboratory |
28 DEC 92 |
325 pages |
| Authors:
Gary Moore; RESEARCH AND DEVELOPMENT LABS CULVER CITY CA
|
| The purpose of this program is to develop the basis for continuing research of interest to the Air Force at the institution of the faculty member; to stimulate continuing relations among faculty members and professional peers in the Air Force to enhance the research interests and capabilities of scientific and engineering educators; and to provide follow-on funding for research of particular promise that was started at an Air Force laboratory ... |
|
| Optical and Kinetic Processes in Excimer Lasers |
14 DEC 92 |
232 pages |
| Authors:
David L. Huestis; M. J. Dyer; W. K. Bischel; D. C. Lorents; G. Black; SRI INTERNATIONAL MENLO PARK CA
|
| This report summarizes a program of research on optical and kinetic processes of importance for excimer laser systems. The research consists of four major topics: (1) investigations of the spectroscopy and chemical kinetics of XeF and XeCl lasers using theoretical techniques, synchrotron radiation excitation, and laser-induced fluorescence, (2) measurement of the angle, wavelength, temperature, and density dependencies of vibrational and rotational Raman gain in H2, D2, and N2, (3) studies ... |
|
| ARO-URI Center for Opto-Electronic Systems Research Final Report for 1 October 1986 - 31 May 1992 |
DEC 92 |
80 pages |
| Authors:
Nicholas George; ROCHESTER UNIV NY INST OF OPTICS
|
| We describe the research accomplishments of a five-year program in the ARO-URI Center for Opto-Electronic Systems Research. Research is included in materials, devices, and systems. Sixteen (16) faculty investigators participated in this effort. During this period, we published 229 papers in refereed journals. Four patents have been applied for. Thirty-eight (38) doctoral students have now completed their thesis research. More than 240 visits were made by faculty to DoD/Army laboratories, ... |
|
Reports by Keyword(s)
OPTICAL COMMUNICATIONS
