| A Comparison of Gyroscope Digital Models for an Electro-Optical/Infrared Guided Missile Simulation (CD-ROM) |
01 FEB 2003 |
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| Authors:
Brent A. Waggoner; NAVAL SURFACE WARFARE CENTER CRANE DIV IN
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 | ELECTRONIC FILE CHARACTERISTICS: 3 files; MS Word (.DOC) and Adobe Acrobat (.PDF). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 12.7 MB. SYSTEMS DETAIL NOTE: IBM-clone PC-compatible. ABSTRACT: This report was prepared by the author as a Master's thesis which partiaily fulfilled the requirements for a Master of Science degree in Electricai Engineering from Rose Hulman Institute of Technology, Terre Haute IN. Equations of motion and digital ... |
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| A Comparison of Gyroscope Digital Models for an Electro-Optical/Infrared Guided Missile Simulation |
FEB 2003 |
214 pages |
| Authors:
Brent A. Waggoner; NAVAL SURFACE WARFARE CENTER CRANE DIV IN
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 | This report was prepared by the author as a Master's thesis which partially fulfilled the requirements for a Master of Science degree in Electrical Engineering from Rose Hulman Institute of Technology, Terre Haute IN. Equations of motion and digital models of a gyroscope were developed for use in electro-optical/infrared missile simulations. Three different models were developed, of varying complexity. Results from these models were compared to actual gyro test data ... |
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| Nanotechnology Instrumentation |
FEB 2003 |
9 pages |
| Authors:
Hyatt M. Gibbs; Galina Khitrova; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
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| Various instruments have been purchased and tested that extend existing nanotechnology capabilities and complement existing equipment. The fact that these laboratories have worked for several years on 3D microcavities and micron-size spectroscopic measurements clarified the need for several complementary instruments. The major new thrust made possible by this grant is spectroscopic capability at 1300 nm. A CCD camera system provides very sensitive detection from 800 to 1600 nm. The existing ... |
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| Dynamically Tunable Photonic Bandgap Crystal Components |
FEB 2003 |
11 pages |
| Authors:
W. R. Lawrence; P. G. Datskos; S. Rajic; TESLA TECHNOLOGIES INC KNOXVILLE TN
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| Periodic photonic crystal structures channel electromagnetic waves much as semiconductors/quantum wells channel electrons. Photonic bandgap crystals (PBC) are fabricated by arranging sub-wavelength alternating materials with high and low dielectric constants to produce a desired effective bandgap. Photons with energy within this bandgap cannot propagate through the structure. This property has made these structures useful for microwave applications such as frequency-selective surfaces, narrowband filters, and antenna substrates when the dimensions are ... |
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| Solid State Research, 2002:3 |
29 JAN 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-31 July 2002. 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 Mr Force, Army, DARPA, MDA, Navy, NSA, and OSD-and also by the ... |
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| Lateral Composition Modulation in InAs/GaSb Superlattices |
01-Jan-2003 |
6 pages |
| Authors:
D W Stokes; R L Forrest; J H Li; S C Moss; B Z Nosho; B R Bennett; L J Whitman; M Goldenberg; HOUSTON UNIV TX DEPT OF PHYSICS
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| We report the analysis of lateral composition modulation in (InAs)m/(GaSb)m superlattices by x-ray diffraction. Vertical and lateral satellite peaks for a 140 period structure were observed. The lateral modulation wavelength, average superlattice composition, and vertical superlattice wavelength were determined. The lateral modulation was observed only along one in-plane direction resulting in quantum wire-like structures along the [110] direction. The unconventional structure of the lateral composition modulation, in which the stacking ... |
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| Terabit Burst Switching |
JAN 2003 |
32 pages |
| Authors:
Jonathan S. Turner; WASHINGTON UNIV ST LOUIS MO DEPT OF COMPUTER SCIENCE
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| This is the final report for Washington University's Terabit Burst Switching Project, supported by DARPA and Rome Air Force Laboratory. The primary objective of the project has been to demonstrate the feasibility of Burst Switching, a new data communication service, which seeks to more effectively exploit the large bandwidths becoming available in WDM transmission systems. Burst switching systems dynamically assign data bursts to channels in optical data links using routing ... |
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| Materials Research Society Symposium Proceedings. Volume 743. GaN and Related Alloys - 2002 |
2003 |
861 pages |
| Authors:
Christian Wetzel; Edward T. Yu; James S. Speck; Angela Rizzi; Yasuhiko Arakawa; MATERIALS RESEARCH SOCIETY WARRENDALE PA
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| Symposium L, "GaN and Related Alloys-2002," was held December 2-6 at the 2002 MRS Fall Meeting in Boston, Massachusetts During nine half-day oral sessions, nine invited talks and 53 contributed talks were given in three poster sessions, 161 posters were presented. This year's nitride symposium again was characterized by a wide scope of nitride related advances spanning from basic materials physics over process technology to high performance devices. Strong development ... |
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| A Method of Comparing 3-D Image Consistency and Quality Between Commercially Available 3-D Scanners |
2003 |
8 pages |
| Authors:
Catherine R. Harrison; Dennis B. Burnsides; HUMAN EFFECTIVENESS DIRECTORATE WRIGHT-PATTERSON AFB OH HUMAN INTERFACE TECHNOLOGY BRANCH
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| With a number of 3-D scanners now available commercially, little work has been done to directly compare their capabilities. This study was designed to characterize differences between the Vitronic Vitus Pro scanner owned by TNO in the Netherlands and the Cyberware WB4 scanner owned by AFRL/HECP at Wright- Patterson Air Force Base. For the purpose of the study, the Cyberware scanner was transported to the TNO facility in the Netherlands. ... |
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| Primary Flight Displays in the T-38C: When Do Differences Among Displays Become Inconsistencies |
2003 |
7 pages |
| Authors:
Michael P. Snow; Guy A. French; Thomas A. Hitzeman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| In the 1980s the US military settled on counterpointers, or dials, as the standard gauge for display of airspeed and altitude in a head-up display (HUD). This format is now making its way into production aircraft, one of which is the T-38C, a US Air Force (USAF) fighter jet trainer. The T-38C is unique in possessing three primary flight displays: a head-down primary flight display (PFD) suite, a HUD in ... |
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| Gain and Loss in an Optically Pumped Mid-Infrared Laser |
2003 |
24 pages |
| Authors:
A. P. Ongstad; R. Kaspi; C. M. Moeller; M. L. Tilton; J. R. Chavez; AIR FORCE RESEARCH LAB KIRTLAND AFB NMDIRECTED ENERGY DIRECTORATE
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| We report on measurements of the temperature dependence of the gain and internal waveguide loss of a 3.4 micrometers, optically pumped InAs/InGaSb, type II, W laser. A high-resolution Fourier Transform Infrared (FTIR) spectrometer was used to measure the laser mode spectra below threshold. To obtain an accurate determination of the gain, a full curve fit to the spectral output of the Fabry-Perot cavity was utilized. Our results indicate very low ... |
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| Efficient Molecular Organic Light-Emitting Diodes Based on Silole Derivatives |
2003 |
16 pages |
| Authors:
Leonidas C. Palilis; Antti J. Maekinen; Hideyuki Murata; Manabu Uchida; Zakya H. Kafafi; NAVAL RESEARCH LAB WASHINGTON DC
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| We report the performance of molecular organic light-emitting diodes (MOLEDs) using silole derivatives as emissive and electron transport materials. Two siloles, namely 2,5-di-(3- biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP) and 1,2-bis(1-methyl-2,3,4,5,- tetraphenylsilacyclopentadienyl)ethane (2PSP), with high PL quantum yields of 94% and 85%, respectively, were used as emissive materials. Another silole, namely 2,5-bis-(2',2''-bipyridin-6- yl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), was used as the electron transport material. MOLEDs using these two siloles and NPB as the hole transport material show ... |
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| Liquid Crystal Technology for Adaptive Optics: an Update |
2003 |
7 pages |
| Authors:
Sergio R. Restaino; Don M. Payne; Jeff T. Baker; Jonathan R. Andrews; Scott W. Teare; G. C. Gilbreath; Dave Dayton; John Gonglewski; NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV
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| The idea of using liquid crystal (LC) devices as an adaptive optics component has been proposed by several authors. In recent years a vigorous research effort has been carried out, and it is still flourishing, in several countries. Mainly the research and experimental work has been concentrated in the USA, U.K. and Russia. There are several reasons why liquid crystals may represent a valid alternative to the traditional deformable mirror ... |
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| Optoelectronic Devices Based on Novel Semiconductor Structures |
31 DEC 2002 |
9 pages |
| Authors:
Yujie J. Ding; ARKANSAS UNIV FAYETTEVILLE
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| During the funding period, the group lead by Prof. Yujie J. Ding at Lehigh University and (formerly at Univ. of Arkansas) has investigated one class of the most important nonostructures; quantum-well dots. This class of the nanostructures serves as the first steps for eventually developing THz emitters and detectors that can be operated at room temperatures. For our effort on quantum-well dots, we have designed and grown InGaAs/GaAs quantum wells ... |
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| 3D Visualization of an Invariant Display Strategy for Hyperspectral Imagery |
DEC 2002 |
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| Authors:
Kang S. Kim; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Spectral imagery provides multi- dimensional data, which are difficult to display in standard three-color image formats. Tyo, et al. (2001) propose an invariant display strategy to address this problem. This approach is to mimic the dynamics of human perception. The dimensionality of the data are reduced by using a Principal Component (PC) transformation, and then displayed by making used of a Hue, Saturation, and Value (HSV) display transform. This study ... |
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| Optical Interconnects for Smart Antenna Driver-Receiver-Switch System for Wireless Communication |
DEC 2002 |
12 pages |
| Authors:
Sadik Esener; CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| The scope of this work is to study the possibility of utilizing devices operating at 0.3THz-30THz for telecommunication applications in general and for interconnects within the box, in particular, for example for Smart Antenna Driver-Receiver-Switch System for Wireless Communication. Our approach in the period covered by this report has been to organize brainstorming sessions within our group to develop potential application areas that could take advantage of interfacing optical interconnects ... |
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| MEMS-Based Light Valves for Ultra-High Resolution Projection Displays |
DEC 2002 |
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| Authors:
F. Picard; C. Campillo; Keith K. Niall; C. Larouche; H. Jerominek; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Ultra-high resolution projectors will improve the visual systems of military flight simulators dramatically. There are changes in aspect angle and aspect rate which fixed-wing fighter pilots can discriminate at long standoff distances, but which cannot be displayed with adequate resolution by the visual systems of contemporary flight simulators. At present the limit of display resolution is fixed by the capacity of the display's projector. This issue is being addressed by ... |
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| Instrumentation Facility for the Evaluation of Photonic and Opto- Electronic Materials |
20 NOV 2002 |
12 pages |
| Authors:
Alex K-Y. Jen; UNIV OF WASHINGTON SEATTLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| The objective of this DURIP program is to develop an integrated instrumentation package that combines the capability of performing accurate and complete materials evaluation and shortening the time required to make critical characterization information available to device engineers and DoD program managers. The facility established in this program is capable of efficiently and systematically characterizing electrical and optical properties of organic conjugated oligomers and polymers for LEDs, solid state lasers, ... |
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| Two Models for Predicting the Probability of a Cloud-Free Line-of-Sight |
08 NOV 2002 |
54 pages |
| Authors:
Susan A. Triantafillou; Guy P. Seeley; RADEX INC BEDFORD MA
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| Two modeling approaches are proposed to predict the probability of a cloud-free line-of-sight (PCFLOS) from space-borne sensor to a missile or other object. The models, which account for various cloud conditions and zenith angles, are suitable for military training and simulation purposes. One approach uses a set of detailed models to generate a cloud scene and randomly place m issiles within it. A simulated sensor then detects the missiles to ... |
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| A Comparison of HMD Ownship Status Symbology and Frame of Reference Orientation During Two Aircraft Control Tasks |
NOV 2002 |
14 pages |
| Authors:
Paul R. Havig; Joseph C. Jenkins; Eric E. Geiselman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| Recent technological advances allow symbology to be displayed on the pilot's visor. A major benefit of this is that the pilots will be able to take this information with them when they look off-boresight. However, when looking off-boresight, the question arises as to what is the best orientation, or frame of reference, for attitude symbology against the horizon (i.e., forward or line- of-sight) in order to maximize interpretation and performance. ... |
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| Development of MOEMS and Smart Systems Based on Transparent Metals |
OCT 2002 |
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| Authors:
Salvatore Baglio; CATANIA UNIV (ITALY)
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| This final interim report includes a statement of the problem studied, a summary of the most important results obtained during the development of the work and in the last four months, after the realization and the chracterization of the designed MOEMS prototypes. A detailed description of the etching procedures techniques at the laboratories of CNM, Spain is reported together with the simulations and the experimental measures made at the laboratories ... |
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| Nonthermionic Cathode Development |
OCT 2002 |
60 pages |
| Authors:
M. A. Hasan; NORTH CAROLINA UNIV AT CHARLOTTE DEPT OF ELECTRICAL ENGINEERING
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| This project focused on developing methods for fabrication of nonthermionic cold cathodes based on a lattice-matched material system consisting of a conducting substrate (source of electrons), a wide-bandgap semiconductor (conduction band closer to the vacuum level), and a low-work function material (to facilitate high emission of electrons). A material system fulfilling these requirements was found in indium phosphide (InP) as a substrate, cadmium sulfide (CdS) as the wide-bandgap semiconductor, and ... |
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| Characterization of Silicon Micro-Oscillators by Scanning Laser Vibrometry |
OCT 2002 |
6 pages |
| Authors:
J. F. Vignola; X. Liu; S. F. Morse; B. H. Houston; J. A. Bucaro; M. H. Marcus; D. M. Photiadis; L. Sekaric; SFA INC LANDOVER MD
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| The dynamics of single-crystal silicon ;100 mum size rectangular paddle oscillators at room temperature have been studied using a recently developed high-resolution scanning laser vibrometer. The dynamic mechanical behavior is determined by scans of the entire device, providing both amplitude and phase spatial maps of the vibratory response. These reveal more than 16 normal modes below 500 kHz. In addition to simple translation and torsional motion, flexural modes of the ... |
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| Characterization of Photorefractive and Photonic Bandgap Composite Fibers |
25 SEP 2002 |
7 pages |
| Authors:
Mark G. Kuzyk; WASHINGTON STATE UNIV PULLMAN DEPT OF PHYSICS
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| This grant was used to buy a tunable continuous wave laser source and beam diagnostic package that is now being used to characterize the spectral response of photorefractive materials and photonic bandgap structures. Devices made of such structures that are incorporated into our unique fibers (made in our laboratory) are also now being characterized. Our laboratory is active in DOD and private-sector-sponsored interdisciplinary research that spans materials processing, characterization, and ... |
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| Mediterranean Workshop and Topical Meeting. "Novel Optical Materials and Applications" NOMA '01 (5th) Held in Cetraro (Italy) on May 20-26, 2001 |
12 SEP 2002 |
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| Authors:
UNIVERSITA DELLA CALABRIA RENDE (ITALY)
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| The Final Proceedings for 5th Mediterranean Workshop on Novel Materials and Applications (NOMA), 20 May 2001 - 27 May 2001. This is an interdisciplinary conference. Topics include novel optical materials like semiconductors, polymers, liquid crystals, composite materials, photorefractive and electro-optical crystals and reduction to practice in actual devices. |
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| Low Level Signal Processing for the Optoelectronic Memory System Interface |
SEP 2002 |
24 pages |
| Authors:
Donald M. Chiarulli; Steven P. Levitan; PITTSBURGH UNIV PA DEPT OF COMPUTER SCIENCE
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| This report describes the development and implementation of channel coding and error detection firmware and software for a prototype optical memory system. Specific accomplishments include the development and implementation of a novel 2D coding system for managing inter-symbol interference in page oriented memory as well as clock extraction, noise filters, 5-7 coder firmware for the memory prototype. Software and firmware implementation of spectral Reed- Solomon error correcting codes were also ... |
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| Nanocomposite and Photonic-Crystal Polymer Structures for Nonlinear Photonic Applications |
SEP 2002 |
20 pages |
| Authors:
L. J. Guo; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| We have developed two experimental techniques for creating photonic structures in nonlinear optical (NLO) polymers with precisions down to nanoscale. The first technique uses nanoimprinting technology to directly pattern the guest-host NLO polymers. It can be applied to the fabrication of photonic bandgap structures in NLO materials, as well as many other photonic structures in both linear and nonlinear polymers. For example, we have shown that micro-ring optical resonator structure ... |
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| Analysis of Enhanced Second-Harmonic Generation in Periodic Nanostructures using Modified Rigorous Coupled-Wave Analysis in the Undepleted-Pump Approximation |
SEP 2002 |
11 pages |
| Authors:
Wataru Nakagawa; Rong-Chung Tyan; Yeshaiahu Fainman; CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| The authors present an extension of the rigorous coupled-wave analysis (RCWA) technique to analyze second-harmonic generation (SHG) in periodic optical nanostructures in the undepleted-pump approximation. They apply this method to analyze SHG in two example nanostructures for which they predict enhanced nonlinearity due to transverse near-field localization of the fundamental optical field in the nonlinear material. First, they examine a periodic nanostructure that yields up to twice the transmitted SHG ... |
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| Radiation Effects on Space-Based Optoelectronic Materials and Devices |
15 AUG 2002 |
44 pages |
| Authors:
Omar Manasreh; NEW MEXICO UNIV ALBUQUERQUE DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| We have investigated the irradiation effects on interband and intersubband transitions in III-V semiconductors quantum wells and superlattices. We also investigated irradiation induced defects in III-nitride thin films including C-H complexes in AlGaN. In particular, we investigated the Gamma-ray, electron, neutron, He(+)-ion, and proton irradiation effects on the intersubband transitions in multiple quantum wells. Thermal annealing recovery of the intersubband transition (or thermal recycling) in heavily irradiated samples has been ... |
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| Defense Display Strategy and Roadmaps |
06 AUG 2002 |
8 pages |
| Authors:
Darrel G. Hopper; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| The Department of Defense (DoD) is developing a new strategy for displays. The new displays' science and technology roadmap will incorporate urgent warfighter needs as well as investment opportunities where military advantage is foreseen. Thrusts now ending include the High Definition System (HDS) program and related initiatives, like flexible displays, at the Defense Advanced Research Projects Agency (DARPA). Continuing thrusts include a variety of Service-led programs to develop micro-displays for ... |
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| Evaluating Alternative Symbologies for Decluttering Geographical Displays |
AUG 2002 |
17 pages |
| Authors:
M. St. John; B. A. Feher; J. G. Morrison; PACIFIC SCIENCES AND ENGINEERING GROUP INC SAN DIEGO CA
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| Reducing the clutter on geographical displays should help military decision-makers manage their attention and concentrate on the most important or threatening tracks. This report presents a study that considered the question of how the decluttered tracks should be represented. The declutter symbols must simultaneously reduce distraction while still supporting situation awareness. We used a visual search task to evaluate six declutter symbologies. The symbologies were created by manipulating two factors, ... |
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| Development of High Average Power Nonlinear Frequency Conversion Devices |
AUG 2002 |
18 pages |
| Authors:
Martin M. Fejer; Robert K. Route; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
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| This program developed microstructured nonlinear optical materials and quasi-phasematched devices based on those materials. The two material systems investigated, periodically-poled ferroelectrics, especially lithium niobate (PPLN), and orientation-patterned GaAs (OP-GaAs) enable nonlinear interactions impossible in conventional nonlinear media. This work included the generation of the shortest blue light pulse then reported (5,4 fs), demonstration of orientation patterned GaAs (OP-GaAs), a mid-IR analog for PPLN operating to wavelengths > 12 micrometers with ... |
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| Spontaneous Growth of an InAs Nanowire Lattice in an InAs/GaSb Superlattice |
AUG 2002 |
11 pages |
| Authors:
B. Z. Nosho; B. R. Bennett; L. J. Whitman; M. Goldenberg; NAVAL RESEARCH LAB WASHINGTON DC
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| We describe a lattice of InAs nanowires that spontaneously organizes in three dimensions within an InAs/GaSb superlattice grown under high As4 flux. As characterized by x-ray diffraction and cross-sectional scanning tunneling microscopy, the periodic nanowires are ~10 nm high, 120 nm wide, and many microns long along [110], with face-centered cubic-like vertical ordering within the superlattice. The unusual vertical ordering creates a lateral composition modulation with half the period of ... |
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| Multi-Band GaAs/AlGaAs Quantum Well Infrared Photodetector (QWIP) Focal Plane Arrays |
29 JUL 2002 |
7 pages |
| Authors:
S. V. Bandara; S. D. Gunapala; J. K. Liu; S. B. Rafol; C. A. Shott; JET PROPULSION LAB PASADENA CA
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| The GaAs/AlGaAs based Quantum Well Infrared Photodetectors (QWIPs) afford greater flexibility than the usual extrinsically doped semiconductor IR detectors because the wavelength of the peak response and cutoff can be continuously tailored over any wavelength between 6-20 micrometers. The spectral band width of these detectors can be tuned from narrow (DELTAlamba/lamba ^ 10 %) to wide (DELTAlamba/lamba ^ 50 %) allowing various applications. Also, QWIP offers multi-color infrared cameras which ... |
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| Advanced Optoelectronic Components for All-Optical Networks |
19 JUL 2002 |
19 pages |
| Authors:
Jeffrey H. Shapiro; Hermann A. Haus; Erich P. Ippen; Leslie A. Kolodziejski; Henry I. Smith; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
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| Under APOSR Grant F49620-96-1-0126, 'Advanced Optoelectronic Components for All-Optical Networks', we have worked to develop key technologies and components to substantially improve the performance, and potentially lower the cost, of future optical networks. Our multidisciplinary team comprised MIT faculty and research staff whose collective expertise spans optical materials, optical component fabrication, ultrafast optics, optical communications, and network architecture. The specific objectives of our program were to: (1) develop key technology ... |
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| PHOCI: Photonic Communications Imager |
19 JUL 2002 |
16 pages |
| Authors:
Dale E. Martin; Darryl S. Dieckman; Phillip A. Wilsey; CLIFTON LABS INC CINCINNATI OH
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| PHOCI is an optical imaging system that is suitable for both image capture and reception of optical communications data. The system includes a novel image/data capture chip that imbeds a high-speed optical data communications receiver technology into the image capture array of a digital video camera system. In addition to the development of a new image/data capture chip, the system includes the design of a hardware interface that allows the ... |
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| Acquisition of a High-Resolution Field Emission Electron Microscope for Nanoscale Materials Research and Development |
JUL 2002 |
14 pages |
| Authors:
James M. FitzGerald; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| Funds are requested for the purchase of a quantitative field emission gun (FEG) scanning electron microscope (SEM) at the University of Virginia (UVa) . This quantitative microscope will contain a 25 kV Schottky FEG, energy dispersive x-ray spectrometer (EDS), in-situ nano-lithography system, chemical mapping and orientation imaging and strain analysis capabilities. The instrument will allow quantitative imaging and compositional analyses to be performed on all types of materials with high ... |
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| Stealth, Precision, and the Making of American Foreign Policy |
JUN 2002 |
133 pages |
| Authors:
Raymond P. O'Mara; AIR UNIV MAXWELL AFB AL
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| The end of the Cold War greatly reduced the risk that a limited, peripheral conflict would escalate to a major war between the great powers. It would seem, with this constraint removed, that the United States should be freer to intervene militarily in the affairs of other peoples. Indeed, in the last decade of the twentieth century, the United States intervened militarily as many times as it had during the ... |
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| Biosensor Array Remotely Addressable Through a Single Optical Fiber |
10 MAY 2002 |
5 pages |
| Authors:
Richard B. Thompson; MARYLAND UNIV BALTIMORE SCHOOL OF MEDICINE
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| The goal of this project was to test a concept for addressing multielement fluorescence-based biosensor arrays through a single optical fiber. Multielement chemical sensor arrays are potentially advantageous for several applications where fiber optic sensors may be used, especially for simultaneous multianalyte determinations in situ. Unfortunately, use of multiple fibers or fiber bundles, or employing an optical switch between array elements at the distal end near the transducers are cumbersome ... |
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| Coherent Control over Excitations and Signals in Semiconductors |
MAY 2002 |
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| Authors:
Keith A. Nelson; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| The underlying technology for Thz polaritonics - programmable, solid- state, THz-bandwidth signal processing - was developed. Two primary steps enabled this achievement. First, an automated spatiotemporal femtosecond pulse shaping system, through which ultrafast laser pulses could be directed at specified times to specified locations (i. e. to specified addresses), was created. Second, the system was applied to spatiotemporal coherent control over THz-frequency polariton waves (which serve as ultrahigh-bandwidth signals) in ... |
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| Mesoscopic Diffractive Optics for Electronic Warfare applications |
MAY 2002 |
10 pages |
| Authors:
Dennis Prather; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| In this report we present our progress in the integration of an 850- nm VCSEL, its driven and a mesoscopic diffractive lenslet array onto a single substrate to produce an integrated opto-electronic multi-chip module for signal fan-out and distribution. The diffractive element performs optical fan-out of the output beam from the VCSEL into an array of focused spots at a plane 1416 ?m from the surface of the VCSEL. This ... |
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| AlGaN Directional Coupler Switch |
MAY 2002 |
194 pages |
| Authors:
Antonio Crespo; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| The dissertation describes an attempt to develop, including material processing, a zero-gap directional coupler using the AlGaN material system in an n-i-n configuration that was grown by MBE. This work compiles the optical and electro-optical properties and models the behavior of AlGaN integrated optic waveguides. The switches are based on the zero-gap electro-optic directional coupler. The models are compared with the experimental results that were obtained. The models used were ... |
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| Large Scale Spectral Hole Burning Memory in Organic Materials |
30 APR 2002 |
15 pages |
| Authors:
Demetri Psaltis; CALIFORNIA INST OF TECH PASADENA
|
| Spectral hole burning is one special holographic technology, which requires to cool down the holographic material down to liquid helium temperature -270 degree of Celsius. However, it can record and generate very fast optical light pulse series and their interaction. Spectral hole burning is of critical interests for fast data storage and optical information processing. This work would be used to evaluate and study the general properties of the materials ... |
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| Microwave-Optical Novel Detection Devices |
30 APR 2002 |
8 pages |
| Authors:
I. Poberezhskiy; H. R. Fetterman; D. H. Chang; CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
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| Frequency conversion of optical waves as a result of refraction through a (moving interface in traveling wave electrooptic phase modulators is analyzed. Two configurations of a device performing conversion are proposed, and their operating requirements are determined. There are several approaches to frequency conversion in optical WDM systems. |
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| Diagnostic Instrumentation |
31 MAR 2002 |
5 pages |
| Authors:
Bruce L. Freeman; TEXAS A AND M UNIV COLLEGE STATION TX DEPT OF NUCLEAR ENGINEERING
|
| The requested image converter camera is a state-of-the-art camera that is able to capture frames as short as 5-to-10 nanoseconds with a resolution of 1,024 x 1,024 pixels. It will be primarily used on an AFOSR-supported research program on explosive driven power generation. It also may be used to enhance research on the SpearTIP program, the ATLAS switch development project, and plasma focus studies. A critical aspect of the author's ... |
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| Novel All-Fiber Devices Based on the Electro-Optic Effect in Poled Fused Silica |
29 MAR 2002 |
29 pages |
| Authors:
Ravinder Jain; NEW MEXICO UNIV ALBUQUERQUE CENTER FORHIGH TECHNOLOGY MATERIALS
|
| This report describes research on the study of novel all-fiber devices based on the electro-optic effect in poled fused silica. The focus of the current work was on electro-optically tunable all-fiber waveplates, since they form the basis of the design of a large array of novel all-fiber devices, including all-fiber modulators and all-fiber tunable filters for WDM telecommunications systems. The all-fiber waveplates studied are applicable for the design of in-line ... |
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| Fabrication Techniques for III-V Micro-Opto-Electro-Mechanical Systems |
26 MAR 2002 |
176 pages |
| Authors:
Jeremy A. Raley; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
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| This thesis studies selective etching techniques for the development of Al(x)Ga(1-x)As micro-opto-electro-mechanical systems (MOEMS). New MEMS technology based on materials such as Al(x)Ga(1-x)As enables the development of micro-systems with embedded active micro-optical devices. Tunable micro-lasers and optical switching based on MOEMS technology will improve future wavelength division multiplexing (WDM) systems. WDM vastly increases the speed of military communications and sensor data processing. From my designs, structures are prepared by molecular ... |
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| A Palm Size Micron-gap ThermoPhoto Voltaic (MTPV) Energy Converter |
26 MAR 2002 |
9 pages |
| Authors:
Robert DiMatteo; CHARLES STARK DRAPER LAB INC CAMBRIDGE MA
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| The goal of this project was to demonstrate that enhanced photovoltaic cell output can be achieved as a function of the physical gap between emitter and receiver in a Micron-gap ThermoPhotoVoltaic (MTPV) system. This was successfully demonstrated. Test specimen assemblies were first built for small gap MTPV testing. Tests were then performed with 0.2 micron gap heater chips on InGaAs photovoltaic cells provided by Dave Wilt of NASA Glenn. Small ... |
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| Active and Reconfigurable Photonic-Bandgap Structures |
10 MAR 2002 |
5 pages |
| Authors:
Wayne A. Shiroma; Jung-Chih Chiao; HAWAII UNIV AT MANOA HONOLULU
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| Progress is reported for several interrelated projects that integrate the areas of quasi-optical electronics, photonic-bandgap (PBG) structures, and microelectromechanical systems (MEMS). These include quasi-optical arrays integrated with photonic-bandgap structures for generation, reception, mixing, linearization, and retrodirection of signals; several beam-steering arrays using reconfigurable PBG ground planes, quasi-optical grids, and reconfigurable elements; and MEMS components for reconfigurable transceivers. |
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| UV/Blue III-Nitride Micro-Cavity Photonic Devices |
04 MAR 2002 |
5 pages |
| Authors:
Hongxing Jiang; Jingyu Lin; III-N TECHNOLOGY INC MANHATTAN KS
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| During Phase I duration, we have further improved blue micro-size light emitter output power efficiencies by optimizing the material qualities as well as device structures. During Phase I optional phase duration, we learned how to achieve white light emission from InGaN/GaN QW micro-size emitters. We have employed three-color emitting (red-blue-green) phosphorus coating on near UV micro-size LEDs and conventional LEDs to obtain white light emission. Comparing with coating an yellow-emitting ... |
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Electrooptical and Optoelectronic Devices
