| Solid State Research |
15 FEB 2004 |
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| Authors:
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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 | This report covers in detail the research work of the Solid State Division at Lincoln Laboratory for the period 1 November 2003 through 31 January 2004. The topics covered are Quantum Electronics, Electro-optical Materials and Devices, Submicrometer Technology, Biosensor and Molecular Technologies, Advanced Imaging Technology, Analog Device Technology, and Advanced Silicon Technology. Funding is provided by several DoD organizations- including the Air Force, Army, DARPA, MDA, Navy, NSA, and OSD-and ... |
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| Study of Linearization of Optical Polymer Modulators |
FEB 2004 |
26 pages |
| Authors:
Anand Gopinath; Ross Schermer; Jaesang Oh; Desalegn Bereka; MINNESOTA UNIV MINNEAPOLIS
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 | To improve the Spur Free Dynamic Range of analog electro-optic modulators in the >10 GHz regime, techniques for improving the linearity of these devices must be developed. This report discusses an investigation into electro-optic directional couplers that use variable coupling in polymer-based waveguide structures. The approach begins with determining the desired response function, in this case a trapezoid. The Fourier transform method is then applied to synthesize the variable coupling ... |
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| DEEPER: Discovery and Exploitation of Emergent Physics through Evolutionary Refinement |
FEB 2004 |
13 pages |
| Authors:
Julian F. Miller; Simon Harding; YORK UNIV (UNITED KINGDOM)
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| The DEEPER project aims to see if artificial evolution can create entirely new technologies, such as transistor-less circuits for sophisticated technological applications. The project is likely to have high impact in basic science. Using artificial evolution to explore "bottom-up" may lead to devices with significant advantages in size/weight ratio, fault tolerance, radiation tolerance, and speed of response. The project objectives are as follows: (1) to build and test an intrinsic ... |
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| Ultrafast Optical Encryption and Waveform Recognition Using Space-Time Optical Engineering |
27 JAN 2004 |
10 pages |
| Authors:
Andrew M. Weiner; PURDUE UNIV LAFAYETTE IN SCHOOL OF ELECTRICAL AND COMPUTER ENGINERING
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| Our overall objective is to demonstrate powerful new signal processing functionalities for ultrafast optical signals, with an emphasis on proof-of-concept experiments of new space-time (parallel-serial) optical processing methods. A key goal is to develop efficient methods for parallel- serial conversion of ultrafast optical signals, with potential application as an enabler for subsystems performing digital logic operations on ultrafast optical bit streams, especially encryption and temporal pattern matching operations. In particular, ... |
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| An Initial Evaluation of Video-based Fire Detection Technologies (CD-ROM) |
09 JAN 2004 |
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| Authors:
Daniel T. Gottuk; Matthew Harrison; Joseph L. Scheffey; Susan L. Rose-Pehrsson; Frederick W. Williams; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
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| ELECTRONIC FILE CHARACTERISTICS: 1 file; MS Word (.DOC). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 5.66 MB and a hardcopy report. SYSTEMS DETAIL NOTE: ABSTRACT: Computer processing and image analysis technologies have improved significantly to allow the recent development of effective video-based fire detection systems. Currently, smoke detection algorithms are the most mature. Typically, these systems are being designed and used in large facilities, outdoor ... |
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| Design and Characterization of MEMS Optical Microphone for Aeroacoustic Measurement |
JAN 2004 |
11 pages |
| Authors:
K. Kadirvel; R. Taylor; S. Horowitz; L. Hunt; M. Sheplak; FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| This paper presents the design and characterization of an intensity modulated optical lever microphone. Optical microphones (OM) have an inherent immunity to environments hostile to electronics due to the spatial separation of the electronics and the acoustic field under test. Theoretical equations for the sensitivity, minimum detectable signal, and frequency response are presented. Physical phenomena responsible for limiting the microphone minimum detectable signal (MDS) are identified, and a model is ... |
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| Diamond-Shaped Semiconductor Ring Lasers for Analog to Digital Photonic Converters |
JAN 2004 |
19 pages |
| Authors:
Malcolm Green; AIR FORCE RESEARCH LAB ROME NY SENSORSDIRECTORATE
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| Photonic/ optoelectronic analog to digital converters (ADCs) have advantages in areas such as precise sampling times, narrow sampling apertures, and the ability to sample without contaminating the incident signal. They also have potential to offer the highest sampling rates and bandwidths. Significant challenges remain in the development of photonic ADC architectures and associated components (e.g. compactness, reduce power consumption v. efficiency, improved mechanical and thermal stability, etc.). Monolithically integrated photonic ... |
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| Physics and Simulation of Optoelectronic Devices XII |
JAN 2004 |
487 pages |
| Authors:
Marek Osinski; Hiroshi Amano; Fritz Henneberger; SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS BELLINGHAM WA
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| Papers on Novel Nanostructures and Optoelectronic Devices, Physics of Quantum Dot Lasers, Simulation of Fiber Devices and Optical Waveguides, Optical Communications, Diode Laser Simulation, VCSels and Resonant-Cavity Photodiodes, Physics of Low Dimensional Structures and Devices, Chaos Synchronization in Diode Lasers, Diode Lasers with Optical Feedback and Wide Bandgap/Visible Materials and Devices. |
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| 0.5-micrometers CMOS Orthogonal Encoding Readout Cell for Active Imaging Systems |
Jan-2004 |
9 pages |
| Authors:
Jorge A Garcia; William Lawler; Nicholas Waite; Fouad Kiamilev; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL ENGINEERING
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| We propose a novel continuous-time simultaneous- readout scheme for active imaging systems based on orthogonal modulation of photodetector signals. The superimposed- continuous-time approach presented here differs from the conventional scheduled-discrete-time scheme in that the photodetector signals are summed in a common bus and read concurrently. We show how that our proposed architecture may be advantageous, particularly in applications where bandwidth requirements for a time-multiplexed scheme are highly demanding. The active ... |
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| Road to Intelligent Optical Devices: Instrumentation for Characterization of Optical Materials |
2004 |
5 pages |
| Authors:
Hailin Wang; Miriam Deutsch; OREGON UNIV EUGENE DEPT OF PHYSICS
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| Equipment acquired and preliminary research results utilizing the equipment are reported. A synchronously-pumped optical parametric oscillator and a regenerative Ti:Sapphire amplifier system, both from Coherent, Inc., have been acquired and installed. The equipment has been used for optical characterization of metallo-dielectric photonic crystals (MDPCs) and for realization of electromagnetically-induced transparency (EIT) in semiconductor heterostructures. Ordered MDPCs have been successfully fabricated via colloidal assembly. EIT in semiconductors have been demonstrated for ... |
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| Multiscale Modeling of Complex Physics: Fluids Solids and Optics |
2004 |
18 pages |
| Authors:
James Glimm; STATE UNIV OF NEW YORK AT STONY BROOK RESEARCH FOUNDATION
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| Algorithms, simulations and modeling for fluid mixing and complex flow were developed. Our front tracking algorithm was improved for its accuracy and conservation properties. Local mesh refinement was added. Simulations in agreement with experiment were obtained. New models of the fluid mixing process were derived, which were also compared to experimental data. |
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| Direct Observation of the Evolution of Both the HOMO and LUMO Energy Levels of a Silole Derivative at a Magnesium/Silole Interface |
2004 |
10 pages |
| Authors:
N. J. Watkins; A. J. Maekinen; Y. Gao; M. Uchida; Z. H. Kafafi; NAVAL RESEARCH LAB WASHINGTON DC
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| The electronic structure of the interface formed by Mg deposition onto 2,5-bis(6 -(2 ,2 -bipyridyl))-1,1-dimethyl-3,4- diphenyl silacyclopentadiene (PyPySPyPy) was investigated using ultraviolet, inverse, and X-ray photoemission spectroscopies. PyPySPyPy is of interest for use as an electron injection/transport layer in high efficiency organic lightemitting diodes. Upon deposition of Mg onto PyPySPyPy there is a shift of the occupied energy level structure to higher binding energy, away from the Fermi level, and ... |
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| Experimental Implementation of a Model-Based Inverse Filter to Attenuate Hysteresis in an Atomic Force Microscope |
2004 |
7 pages |
| Authors:
Andrew Hatch; Ralph G. Smith; Tathagata De; NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION
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| This paper addresses the development and experimental validation of a model-based, open loop control design for mitigating the frequency-dependent effects of hysteresis in an atomic force microscope (AFM). The models are based on homogenized energy relations which characterize the hysteretic constitutive behavior of the piezoceramic AFM stage. Approximate model inverses are then employed as filters to linearize transducer dynamics for control design. When experimentally implemented in open loop control designs, ... |
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| High-Power Optical Microswitch Based on Direct Fiber Actuation |
2004 |
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| Authors:
Kevin R. Cochran; Lawrence Fan; Don L. DeVoe; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
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| An optical microswitch is presented for high-power switching applications. The device, capable of switching several watts of optical power, employs large-core multimode fibers to switch output from a laser diode operating at a wavelength of 810 nm. Switching is achieved through the direct deflection of an on-chip fiber using a high force electrothermal actuator. Optical losses in the system are identified, and optical efficiency is predicted and verified with experimental ... |
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| Long Wavelength Video-Based Event Detection, Preliminary Results from the CVNX and VS1 Test Series, Ex-USS SHADWELL, April 7-25, 2003 |
30 DEC 2003 |
50 pages |
| Authors:
Daniel A. Steinhurst; Christian P. Minor; Jeffrey C. Owrutsky; Susan L. Rose-Pehrsson; Daniel T. Gottuk; NAVAL RESEARCH LAB WASHINGTON DC
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| This report documents results from long wavelength-response, or night vision video detection (LWVD) of fire, smoke, and hot objects obtained during the CVNX and VS1 Test Series. The cameras demonstrated thermal imaging capabilities and an enhanced sensitivity to flaming fires and other hot objects when compared to co-located regular video cameras. Video event detection with long wavelength cameras is discussed and compared with the results of video event detection systems ... |
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| Long Wavelength Video-Based Event Detection, Preliminary Results from the CVNX and VS1 Test Series, ex-USS Shadwell, April 7-25, 2003 (CD-ROM) |
30 DEC 2003 |
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| Authors:
Daniel A. Steinhurst; Christian P. Minor; Jeffrey C. Owrutsky; Susan L. Rose-Pehrsson; Daniel T. Gottuk; NAVAL RESEARCH LAB WASHINGTON DC CHEMICAL DYNAMICS AND DIAGNOSTICS BRANCH
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| ELECTRONIC FILE CHARACTERISTICS: 36 files; Adobe Acrobat (.PDF), MS Excel (.XLS) and Audio Video Interleave (.AVI). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 611 MB. SYSTEMS DETAIL NOTE: ABSTRACT: This report documents results from long wavelength-response, or nightvision video detection (LWVD) of fire, smoke, and hot objects obtained during the CVNX and VS1 Test Series. The cameras demonstrated thermal imaging capabilities and an enhanced sensitivity to ... |
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| Adaptive Optoelectronic Eye |
23 DEC 2003 |
53 pages |
| Authors:
Pallab Bhattacharya; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| The objective of this multidisciplinary research program was to develop a versatile image sensor technology where advances in optical devices and merging of optoelectronic, micro-optic and micromechanical components would allow the feasibility of tightly coupled adaptive focal plan arrays. We adopted a layered architecture in which the essential elements were: The front-end optics consisting of a variable focus Fresnel lens, a microlens array and a microprism array for color dispersion ... |
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| Solid State Research Quarterly Technical Report 2003:3 |
18 DEC 2003 |
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| Authors:
David C. Shaver; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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| This report covers in detail the research work of the Solid State Division at Lincoln Laboratory for the period 1 May through 31 July 2003. Chapter 1, on quantum electronics, contains the paper "Widely Tunable, Aluminum- Free GaSb-Based, Mid-Infrared Semiconductor Lasers." Chapter 2, on electrooptical materials and devices, contains the paper "Model of Tunneling Resistivity between Bonded Semiconductor Wafers." Chapter 3, on submicrometer technology, contains two papers: "Method for Testing ... |
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| Zinc Oxide Based Photonics Devices |
09 DEC 2003 |
25 pages |
| Authors:
Yungryel Ryu; Henry W. White; MOXTRONICS INC COLUMBIA MO
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| The objectives of this project are to develop critical technologies required for ZnO-based photonic device; high-quality ZnO film growth, p/n-doping processes, etching processes, and fabrication of ZnO light emitting devices. We have developed such critical technologies% in this Phase I work. Prototype ZnO light emitting devices have been successfully fabricated and tested for a feasibility study to assess whether ZnO devices can satisfy the operational requirements as photonics devices to ... |
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| Electro-Optic Modulation and Mirrorless Lasing Using Unique Organic Materials and Single-Crystal Films |
05 DEC 2003 |
7 pages |
| Authors:
Mrinal Thakur; AUBURN UNIV AL DEPT OF MECHANICAL ENGINEERING
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| The accomplishments in this project include the following: (1) preparation of single-crystal films of specific organic nonlinear optical materials, including molecular salts such as DAST; (2) measurement of electro- optic coefficients; (3) demonstration of electro-optic modulation with a modulation depth of 80% at a field of 4 V/micrometers for a single-pass device (using a 3-micrometer thick film); (4) demonstration of high-speed modulation with a speed up to 1.5 GHz; (5) ... |
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| Discovery and Utilization of Nanoscale and Mesoscale Enabling Materials and Processes for Optoelectronics and Electronic Interconnects |
DEC 2003 |
93 pages |
| Authors:
Sanford Asher; John T. Yates Jr; Craig Wilcox; Gilbert Walker; Rob Coalson; PITTSBURGH UNIV PA DEPT OF CHEMISTRY
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| This report describes the development of enabling mesoscale materials and development of new instrumentation and methodologies for nanoscale material characterization. The work involved the following eight separate efforts: 1. Use of Colloidal Array Photonic Materials for Photochemically and Photothermally Controllable Diffraction Devices; 2. Development of Methods to Fabricate Nanoscale and Mesoscale Enabling Materials such as Magnetically Anisotropic Spherical Particles; 3. Development of Methods to Fabricate Particles -with Chemically Anisotropic Surfaces; ... |
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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
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| 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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| Single-Chip Integrated Electro-Optic Polymer Photonic RF Phase Shifter Array |
DEC 2003 |
14 pages |
| Authors:
Jeehoon Han; Byoung-Joon Seo; SeongKu Kim; Hua Zhang; Harold R. Fetterman; CALIFORNIA UNIV REGENTS LOS ANGELES
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| This paper demonstrates a four-element integrated photonic radio-frequency (RF) phase shifter array in a single chip with an advanced configuration. These devices are integrated using electrooptic polymer materials and involve several novel technologies. Measurements of this configuration showed that our four outputs were independent and had highly linear RF phases over 360 degrees with negligible RF power fluctuation at the modulation frequency of 20 GHz. This significant improvement is capable ... |
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| High-Speed Chaos in an Optical Feedback System with Flexible Timescales |
24 NOV 2003 |
8 pages |
| Authors:
Jonathan N. Blakely; Lucas Illing; Daniel J. Gauthier; DUKE UNIV DURHAM NC DEPT OF PHYSICS
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| We describe a new optoelectronic device with timedelayed feedback that uses a Mach-Zehnder interferometer as passive nonlinearity and a semiconductor laser as a current-to-optical frequency converter. Band-limited feedback allows tuning of the characteristic time scales of both the periodic and high dimensional chaotic oscillations that can be generated with the device. Our implementation of the device produces oscillations in the frequency range of tens to hundreds of megahertz. We develop ... |
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| Electromagnetic Modelling of Quantum-Well Infrared Photodetectors |
04 NOV 2003 |
11 pages |
| Authors:
Theodor Tamir; POLYTECHNIC UNIV BROOKLYN NY
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| Our work has focused on two principal aspects: (a) developing a rigorous modal transmission-line (MTL) approach for modeling quantum-well infrared photodetectors (QWIPs) and other optoelectronic devices. and (b) applying this approach to evaluate the performance of actual QWIPs. The geometry of the QWlPs may include any number of different dielectric and metallic layers, which may generally be periodic with &arbitrary profiles, The theoretical part (a) was carried out for both ... |
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| Joint Services Optics Program Reasearch in the Optical Sciences |
21 OCT 2003 |
47 pages |
| Authors:
James C. Wyant; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
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| This report describes research on eight different projects ranging from fundamental quantum optics to optical engineering. Topics discussed include me following: Collisional dark states and matter wave transparency, high power diffraction limited surface emitting flared lasers, qubits and quantum gates with laser trapped atoms, radiatively perfect quantum dot, 3D semiconductor nanocavities, excitonic and biexcitonic nonlinear optical processes in semiconductor quantum wells, blue lasers and near field techniques for ultra high ... |
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| Moving Reflector Type Micro Optical Switch for High-Power Transfer in a MEMS-Based Safety and Arming System |
14 OCT 2003 |
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| Authors:
Kevin R. Cochran; Lawrence Fan; Don L. Voe; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
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| Development of a moving reflector type micro optical switch fabricated by deep reactive ion etching (DRIE) in silicon on insulator (SOI) substrates is presented. The device discussed is a key component in a MEMS-based safety and arming (S&A) system for use in underwater weapons. In this switch, an etched vertical sidewall reflector is electrostatically actuated in and out of the optical path between input and output optical fibers. Fabrication is ... |
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| Determination of the Width of the Carrier Recombination Zone in Organic Light-Emitting Diodes |
18 SEP 2003 |
5 pages |
| Authors:
J. Kalinowski; L. C. Palilis; W. H. Kim; Z. H. Kafafi; GDANSK TECHNICAL UNIV (POLAND)
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| Bilayer organic light-emitting diodes based on tris-(8-hydroxyquinolinato) aluminum III have been fabricated where the thickness of the light-emitting layer was varied between 10 and 80 nm while maintaining a constant total thickness of the organic layers. The electroluminescence quantum efficiency of the devices was measured as a function of the emitter thickness, and used to determine the width of the carrier recombination zone at different electric fields. The width of ... |
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| Spatial and Quasi-Optical Power Combining a Multidisciplinary University Research Initiative |
12 SEP 2003 |
107 pages |
| Authors:
L. W. Pearson; CLEMSON UNIV SC DEPT OF ELECTRICAL ANDCOMPUTER ENGINEERING
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| This MURI program comprised an integrated effort for computer aided design (CAD) modeling of quasi optical structures and three related experimental efforts. The CAD activity involved the electromagnetic modeling of radiation from planar structures, state-variable modeling of microwave circuits, and thermal modeling of microwave circuits. The latter two have been combined into a unified CAD system that deals with microwave circuits, including electro-thermal effects. Electromagnetic structures can be coupled to ... |
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| Electro Optical Properties of Copolymer Blends |
01 SEP 2003 |
47 pages |
| Authors:
Frank E. Karasz; MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING
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| A number of investigations concerning the synthesis, characterization and properties of electro-optical macromolecules has been completed. A wide range of structures mostly based on a conjugated main chain and focused on providing high photo-luminescent and electroluminescent quantum yields, were produced and fabricated into opto-electronic devices. Parallel investigations have continued the long established study of polymer blends by various physical means. Amongst others, a dielectric relaxation study has compared the properties ... |
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| Exploitation of Omnidirectional Reflectivity |
SEP 2003 |
27 pages |
| Authors:
Tri Van; Dennis Nyquist; Leo Kempel; Gang Bao; MISSION RESEARCH CORP SANTA BARBARA CA
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| In this final report, we have summarized the progress made during the period of September 1. 2002-September 30, 2003. We derive the integral equations for (electric fields propagating in a fiber of arbitrary cross section and arbitrary refractive index. Mathematical analysis of conventional optical fibers is rich and widely available in literature, for example 3, 9, 11 and references therein. It helps the advancement of optical fiber industry in understanding ... |
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| Bistable Reflective Etalon (BRET) |
SEP 2003 |
25 pages |
| Authors:
Zane Shellenbarger; Joseph H. Abeles; SARNOFF CORP PRINCETON NJ
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| This project designed, fabricated, and characterized normal-incidence etalon structures at 1550 nm wavelength operation for application, as bistable elements, to photonic analog-to-digital conversion. The semiconductor devices consist of planar multi-quantum well saturable absorbers situated within an etalon defined by epitaxially grown reflective distributed Bragg reflector mirrors. Two iterations were completed and characterized in a transmissive configuration of greatest interest to Air Force Research Laboratories. Nonlinear transmission was observed. Bistability could ... |
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| Trends in Nanotechnology Conference (TNT 2003) Held in Salamanca, Spain, 15-19 Sep 2003. Posters Abstracts |
SEP 2003 |
555 pages |
| Authors:
Uzi Landman; GEORGIA INST OF TECH ATLANTA SCHOOL OFPHYSICS
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| In response to the growing awareness of the importance of nanotechnology, "Trends in Nanotechnology" (TNT) has become key meeting in the nanotechnology field since it brings fresh ideas on organization, first level speakers, and an environment suitable to keep discussions, ideas exchange and enhance scientific and personal relations among participants. TNT2003 was held in large part due to the overwhelming success of earlier Nanotechnology Conferences, TNT2000, TNT2001 and TNT2002. The ... |
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| Microwave Photonics in Dual-Use Military Systems - A Personal Perspective |
20 AUG 2003 |
17 pages |
| Authors:
Afshin S. Daryoush; DREXEL UNIV PHILADELPHIA PA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| Microwave photonics has come of age and there are a number of military applications that could directly benefit from. Optically controlled phased array antenna is one of the most widely pursued applications. The fiber optic links are employed for distribution of a variety of communication, intelligence, tracking, radar signals. There are a number of issues that dictate the type of architecture that is employed for effective and reliable control of ... |
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| Optoelectronic Components and Integrated Circuits Including Up and Down Conversion Technique and Hybrid Integration Technology |
20 AUG 2003 |
20 pages |
| Authors:
D. Decoster; S. Dupont; V. Magnin; UNIVERSITE DES SCIENCES ET TECHNOLOGIELILLE (FRANCE)
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| Microwave optical links can be considered as basic bricks for some emerging system applications such as optically supplied microwave antennas. Emitters, optical switching matrices, high speed photodetectors and specific components for up or down conversion, are generic devices or functions for microwave optical links. We will describe main ways to generate microwave or millimetre wave signals through an optical fibre: direct and external modulation, optical control of microwave oscillators, generation ... |
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| Optoelectronic Components and Integration Devices: From Concepts to Applications |
20 AUG 2003 |
18 pages |
| Authors:
D. Jaeger; A. Stoehr; GERHARD MERCATOR UNIV DUISBURG (GERMANY)
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| The field of optics-microwave interactions can generally be defined as the study of high-speed photonic devices operating at microwave, millimeter wave or even THz frequencies and their use in microwave or photonic systems. In this multidisciplinary field at the interface between microwave techniques, ultrafast electronics and photonic technologies, typical investigations include, for example, high-speed and microwave signal generation, processing and conversion as well as the distribution and transmission of microwave ... |
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| Wireless and Optics - A Survey and Overview of Broad Band Fiber-Fed Radio Systems |
20 AUG 2003 |
3 pages |
| Authors:
J. J. Lee; RAYTHEON ELECTRONIC SYSTEMS EL SEGUNDO CA
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| What is "Fiber Radio?" Fiber Radio is a fiber-fed radio system using fiber optic links or networks to distribute video, voice, and data for mobile and wireless applications. Antenna remoting is an example where MMW subcarriers at 18, 24, 38', or 60 GHz with information are transmitted from central office to base stations. This emerging technology has been demonstrated for applications such as community communications and pic%cell wireless systems for ... |
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| RF Photonics for Beamforming and Array Applications |
20 AUG 2003 |
9 pages |
| Authors:
J. J. Lee; RAYTHEON ELECTRONIC SYSTEMS EL SEGUNDO CA
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| This lecture focuses on the applications of RF photonics for array antennas in signal distribution, beamforming, beam control, and antenna remoting. Examples are given to discuss the requirements, benefits, and design approaches of photonics for phased array antennas. The first demonstration of using photonics for a dual band array was conducted in 1990. Later a wide band conformal array controlled by photonics was built and tested. This example talks about ... |
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| Optical Architectures for Signal Processing - Part A |
20 AUG 2003 |
9 pages |
| Authors:
B. Cabon; INSTITUT MEDITERRANEEN D'ECOLOGIE ET DEPALEOECOLOGIE GRENOBLE (FRANCE)
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| The progress achieved in performing optoelectronic components makes feasible the generation of microwave functions using all-optical devices. in the first part of this presentation, the principle of microwave filtering using optical interferometers is described for both optical coherent and non-coherent regimes. Optical components are addressed in terms of microwave-optical S parameters. The experimental realization of filters using fibers or integrated optics is explained. In the second part, the use of ... |
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| Optical Processing of Microwave Signals - Part B |
20 AUG 2003 |
12 pages |
| Authors:
Jean Chazelas; THALES RESEARCH AND TECHNOLOGY ORSAY (FRANCE)
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| The availability of optoelectronic components operating up to 20 GHz brings attractive perspectives for optical processing of microwave signals. Furtherinore optically carried microwave signals can experience large time delays, especially in fiber based systems, providing time-frequency products in the range between 100 and 1000. Owing to their inherent parallel processing capabilities, optoelectronic architectures are well suited for the implementation in radar and electronic warfare systems of basic functions such as ... |
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| Opto-Microwave Signal Processing: Up and Down Conversion Techniques |
20 AUG 2003 |
17 pages |
| Authors:
Tibor Berceli; Mark Csoernyei; BUDAPEST UNIV OF TECHNOLOGY AND ECONOMICS (HUNGARY)
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| This application note introduces the concepts of opto-microwave signal processing used in several communication systems today. Emphasis is placed on optical-microwave up and down conversion techniques. |
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| Novel Microwave Photonic Techniques in the Future Military Systems |
20 AUG 2003 |
17 pages |
| Authors:
Afshin S. Daryoush; DREXEL UNIV PHILADELPHIA PA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| This paper reviews a number of novel applications of microwave photonic techniques in future military systems. One category is light interactions with microwave devices and circuits, which has contributed to the beginning of microwave photonics. The performance of HBT is the most attractive over FET and HEMT devices, due to its I-V dependence on high bandwidth and optical sensitivity. Moreover, different techniques of optical ADC are reviewed and among them ... |
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| Optical Beamforming Networks for Radars & Electronic Warfare Applications |
20 AUG 2003 |
14 pages |
| Authors:
Jean Chazelas; Daniel Dolfi; Sylvie Tonda-Goldstein; Jean-Pierre Huignard; THALES RESEARCH AND TECHNOLOGY ORSAY (FRANCE)
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| Future microwave systems will be generally based on active electronic antennas. This evolution is determined by requirements of improved performances of these equipments in terms of reliability, jamming resistance, flexibility for the beamformning in the transmit and in the receive mode. Such antennas will be use in a large number of applications such as radar, communication and electronic warfare. In order to satisfy this multiftuictional aspects, it will be necessary ... |
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| Liquid Crystalline Symposium |
14 AUG 2003 |
3 pages |
| Authors:
Patrick T. Mather; CONNECTICUT UNIV STORRS LIQUID CRYSTALLINE POLYMER RESEARCH CENTER
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| Research in the physics, chemistry, and technology of liquid crystals (LCs) is alive and well, as demonstrated by the vitality of this recent LC symposium and the accompanying volume. While symposia focused on liquid crystal (LC) materials scienc have a strong tradition of excellence at MRS meetings, organizers and attendees of the Fall 2001 MRS Symposium CC agree that this was an especially excellent conference. Talks spanned a very diverse ... |
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| International Symposium Advanced Display Technologies (12th): Basic Studies of Problems in Information Display (FLOWERS'2003) |
AUG 2003 |
243 pages |
| Authors:
RUSSIAN ACADEMY OF SCIENCES MOSCOW (RUSSIA) LEBEDEV INST
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| The Final Proceedings for 12th International Symposium Advanced Display Technologies, 25 August 2003 - 27 August 2003. This is a multidisciplinary conference centered on development of display capabilities. Topics to be presented include Field Emission Displays, Liquid Crystal Displays, Organic Luminescent Displays, W = V + V = Vacuum Fluorescent Displays + Volume Vision, Electroluminescent & Electrochromic Displays & Ergonomics,Ray-Tubes, Selected Developments (PDP, Projection Devices, Civilian and Military Applications etc.) ... |
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| Fast Photoconductivity in Self-Assembled Columnar Liquid Crystalline Photorefractive Materials |
30 JUL 2003 |
32 pages |
| Authors:
Kenneth D. Singer; Virgil Percec; CASE WESTERN RESERVE UNIV CLEVELAND OH
|
| We have elaborated a novel strategy for the self-assembly and co- assembly of functional supramolecular columns that self-organize in a hexagonal columnar liquid crystalline phase forming high carrier mobility organic semiconductor materials for applications in photorefractive and photovoltaic devices. Among our accomplishments are, (1) synthesis and elucidation of the structure of self-organizing dendron materials into a helical superstructure supporting an axial transport channel suggesting that structure and function can be ... |
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| Lifetime and Longevity of an Intense, Photoconductivity - Switched Stacked Blumlein Modulator for Ultra - Wideband HPM Applications |
28 JUL 2003 |
58 pages |
| Authors:
Carl B. Collins; Farzin Davanloo; TEXAS UNIV AT DALLAS RICHARDSON CENTERFOR QUANTUM ELECTRONICS
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| In this work, experiments with the stacked Blumlein prototype pulsers were conducted under different conditions of operation at power levels bypassing 100 MW. Special attention was placed on broadening of the current channels in the avalanche photoconductive switch in order to improve lifetime. The mechanical and semiconductor properties of amorphic diamond were employed to improve the lifetime by coating the switch cathode or anode areas or both. Issues concerning the ... |
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| Controlled Redox and Electrical Properties in Polyheterocycles |
21 JUL 2003 |
20 pages |
| Authors:
John R. Reynolds; FLORIDA UNIV GAINESVILLE DEPT OF CHEMISTRY
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| The Reynolds research group at the University of Florida has developed an extensive program for the development and application of variable gap conjugated polymers which are luminescent and semiconducting, can be doped to high levels of conductivity, and can be redox switched between charge neutral, oxidized (p-type), and reductive (n-type) states. A soluble and processable dibutyl derivative of poly(3,4-propylenedioxy-thiophene) has been synthesized directly in its neutral form by Grignard metathesis ... |
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| Proceedings of Photon Processing in Microelectronics and Photonics II held in San Jose, California on January 27-30, 2003 |
18 JUL 2003 |
705 pages |
| Authors:
Alberto Pique; Koji Sugioka; Peter R. Herman; Jim Fieret; SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS BELLINGHAM WA
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| Laser processing of materials, once largely curiosity driven, is now an established technology for micromachining, thin film synthesis, device packaging, rapid prototyping, and even nanoscale synthesis and processing of materials. The main driving force behind these developments is the seemingly limitless adaptability of lasers in providing unique material processing solutions, manufacturing of otherwise unattainable devices and structures, and the implementation of cost- effective solutions to complex manufacturing processes. The use ... |
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| Multifunctional Materials and Structures |
01 JUL 2003 |
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| Authors:
S. Yarlagadda; DELAWARE UNIV NEWARK CENTER FOR COMPOSITE MATERIALS
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| Multifunctional composites enable transformation of the Navy: Combine best of both worlds. Passive properties: Strength - Stiffness - Toughness - Fire-hardness - Blast resistant - corrosion resistant - LO. Active properties: Sensors/Actuators - Networking and Communications - Active LO and Signature - Self-Healing - Health Monitoring - Electronics/CPUs. Manufacturing technologies to integrate multifunctionality are essential. |
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Electrooptical and Optoelectronic Devices
