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Microwave, MTT-S International Symposium

作者： F. Masot K.A. Remley R.T. Kollipara A. Weisshaar V.K. Tripathi Department of Applied Physics University of Seville Seville Spain Department of Electrical and Computer Engineering Oregon State University Corvallis OR USA Oregon State University Corvallis OR US Dept. of Electr. & Comput. Eng. Oregon State Univ. Corvallis OR USA

A capacitively loaded structure is proposed for synchronizing the microwave and optical signals in a field-induced multiple quantum well traveling-wave electrooptic modulator. The design procedure for the modulating s... 详细信息

关键词： Electrooptic modulators Microstrip Optical modulation Optical waveguides High speed optical techniques Capacitance Quantum well devices Periodic structures Gallium arsenide Impedance

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Book reviews

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Minds and Machines 1996年第2期6卷 239-285页

作者： Abbott, Barbara Herskovits, Annette Peterson, Philip L. Mele, Alfred R. Cole, David J. Crevier, Daniel Pelletier, Francis Jeffry Berkeley, Istvan S. N. Kitts, Brendan J. Brown, Mike Paliouras, George Department of Linguistics and Languages Michigan State University East Lansing USA Department of Philosophy Michigan State University East Lansing USA Program in Applied Linguistics Boston University Boston USA Department of Philosophy Syracuse University Syracuse USA Department of Philosophy Davidson College Davidson USA Department of Philosophy University of Minnesota Duluth USA Department of Electrical Engineering École de Technologie Supérieure Université du Québec Montréal Canada Department of Philosophy University of Alberta Edmonton Canada Department of Computing Science University of Alberta Edmonton Canada Biological Computation Project University of Alberta Edmonton Canada Center for Complex Systems Brandeis University Waltham USA Department of Computer Science University of Manchester Manchester U.K.

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Degradation mechanism of contact resistance during window formation

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第1期79卷 93-100页

作者： Sekine, M Kakuhara, Y Kikkawa, T Nonmember NEC ULSI Device Development Laboratory Sagamihara Japan 229 Graduated in 1985 from Department of Metal Materials Osaka University where he received his Master's degree in 1988. He joined NEC in 1988. Graduated in 1984 from the Department of Electrical Engineering Aoyama Gakuin University and she received her Master's degree from Shinshu University in 1986. She joined NEC in 1986. She is a member of the Applied Physics Society. Graduated in 1974 from the Department of Electrical Engineering Shizuoka University where he received his Master's degree in 1976. He received his Ph.D. degree from Tokai University. He joined NEC in 1976. He is engaged in research and development of semiconductor LSI device and process. He was a Visiting Researcher at MIT from 1983 to 1984. He is currently a director of multilayer wire formation program ULSI Device Development Institute. He is a member of IEEE ICS and Applied Physics Society.

This paper describes a contact degradation mechanism during window formation followed by selective tungsten chemical vapor deposition (W-CVD). Contact resistances by using selective W-CVD were increased as the overetching rate increased. Surface analysis made it clear that the Si surface at the bottom of contact was damaged and oxygen atoms from dielectrics were introduced during window etching. These damage and oxygen atoms break Si-Si bonds and make Si-O bonds after additional ion implantation. The Si-O bonds degrade the valence-band density of states of the Si surface. Such a damaged surface will not react with WF6. This inactivation is the reason for contact degradation. Controlling the Si surface state by using the chemical dry etching (CDE) technique solves this problem.

关键词： selective W-CVD contact chemical dry etch

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Correction to "Theory for Passive Mode-Locking in Semiconductor Laser Structures Including the Effec

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IEEE Journal of Quantum Electronics 1996年第11期32卷 2017-2017页

作者： R.G.M.P. Koumans R.A. Salvatore D. Eliyahu R. van Roijen Department of Electrical Engineering California Institute of Technology Pasadena CA USA Electrical and Computer Engineering Department University of California Santa Barbara CA USA Department of Applied Physics California Institute of Technology CA USA Philips Laboratories Briarcliff Manor NY USA

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Affordability, logistics R&D and fleet systems

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NAVAL ENGINEERS JOURNAL 1996年第3期108卷 199-213页

作者： Schulte, DP Skolnick, A He has supported the development and operation of several naval systems including advanced component selection for Trident II fire control and navigation systems. He served as branch manager of the Surface Ship ASW Combat System Branch which acted as the acquisition engineering agent for the AN/SQQ-89 Surface Ship Anti-Submarine Warfare Weapon System. He was then selected to manage the Module Engineering Department which provided engineering support to numerous naval systems including the AN/BSY-1 Submarine Combat System and the Trident II fire control and navigation system. He then served as the deputy program manager for NAVSEA Progressive Maintenance (2M/ATE). He holds a B.S. degree in Electrical Engineering from Purdue University and currently is pursuing a Maste's degree in Public Environmental Affairs at Indiana University—Purdue University Indianapolis. He served at Applied Physics Laboratory/The Johns Hopkins University in missile development then aboard USS Boston (CAG-1) and played leading roles in several weapon system developments (Regulus Terrier Tartar Talos) inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. He led the Navy's High Energy Lasers and Directed Energy Weapons development efforts. He was vice president advanced technology at Operations Research Inc. and vice president maritime engineering at Defense Group Inc. before starting SSC in 1991. Dr. Skolnick holds a B.S. degree in Mathematics and Economics Queens College an M.A. degree in Mathematics and Philosophy Columbia University an M.S. degree in Electrical/Aeronautical Engineering U.S. Naval Postgraduate School and a Ph.D. in Electrical Engineering and Applied Mathematics from Polytechnic University in New York. He is the author of many published papers on engineering design issues source selection procedures and large-scale complex technology problems

The Fleet continues to require high performance systems that can operate with dependability in the seas' unforgiving environments and under hostile action. Those demands are not new. What has changed is the urgent priority formerly assigned to national defense issues. The arguments for continued superpower military strength are now roiled in politics along with unsettled budgets and uncertain force level projections. Current expectations revolve about indefinite fiscal and operational issues (difficult funding constraints and broadband threats). In the actual event of ''doing more with less,'' a practical response is to apply the creative power available from sound engineering judgement and the crucible of experience to the immediate needs of the Fleet. The attempt to shorten the path between advanced development effort and Fleet use has been tried occasionally in the past, often, without exemplary results. The Sustainable Hardware and Affordable Readiness Practices (SHARP) program, is a generic R&D effort under OpNav sponsorship that has been working steadily on sensible solutions to product engineering problems. Armed today with fast-time, large-scale computation abilities and modern tools for technical problem solving coupled with specialized engineering knowledge, it has been refreshed and is underway satisfying existing Fleet needs. The relationship between fully responsive engineering services and current operational needs is always demanding. The connection between advanced engineering development (6.3 category funds) and immediate Fleet usage brings added complexity and challenge, both technical and organizational. Illustrative examples of affordable engineering solutions to ''retain, revise, replace or retire'' questions are presented within the context of both Fleet realities and budgetary limitations. The discussion covers legacy system support, civil/military considerations and Fleet maintenance issues. It describes the substantial and critical payoffs i

关键词： Warships

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Analysis of nonreciprocal mode-conversion properties of magnetooptic channel waveguides using the finite element method

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第10期79卷 32-39页

作者： Zhuang, XP Koshiba, M Tsuji, Y Faculty of Engineering Hokkaido University Sapporo Japan 060 Graduated from the Department of Communication Engineering Guellin Electronic Institute China in 1986. She received her M.S. degree from Hokkaido University in 1991 and was admitted to the doctoral program. She has been engaged in research on the optimum design of magnetooptic waveguides for nonreciprocal optical devices. Graduated in 1971 from the Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1973 and his Dr. of Eng. degree in 1976. In 1976 he became a Lecturer in the Department of Electronic Engineering Kitami Institute of Technology where he was promoted to Associate Professor in 1977. In 1979 he became an Associate Professor at Hokkaido University where he was promoted to Professor in 1987. He has been engaged in research on optical and wave electronics. In 1987 he received a Best Paper Award. He is the author ofFundamentals of Finite Element Method of Optics and Waves(Morigkata Publ.)Optical Waveguide Analysis(Asakura Publ.)Optical Waveguide Analysis(McGraw-Hill Book Co.) andOptical Waveguide Theory by the Finite Element Method(KTK Scientific Publishing/Kulwer Academic Publishers). He is also co-author of one book and has written chapters in six other books. He is a member of the Institute of Television Engineers of Japan the Institute of Electrical Engineers of Japan the Japan Society for Simulation Technology the Japan Society for Computational Methods in Engineering and the Japan Society of Applied Magnetics and Mechanics. He is also an IEEE Senior Member. Graduated in 1991 from me Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1993. He is currently in the doctoral program. He has been engaged in research on quantum wave phenomena and computer-aided design of optical and quantum effect devices.

To evaluate nonreciprocal mode conversion characteristics in a magnetooptic channel waveguide, a finite element analysis based on the scalar wave approximation is formulated for the first time. A simple iterative calculation method is conceived for solution of the nonlinear eigenvalue equations finally obtained in which the two polarizations are coupled. Specifically, the maximum isolation ratio in the mode-conversion-type magnetooptic rib guide was evaluated and the validity of the method is confirmed by comparison with published experimental results.

关键词： nonreciprocal optical devices magnetooptic waveguide nonreciprocal mode conversion finite element method numerical analysis

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High-frequency analysis of radiation field excited by incident whispering-gallery mode over concave-to-convex boundary

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第7期79卷 10-21页

作者： Goto, K Ishihara, T National Defense Academy Yokosuka Japan 239 Graduated in 1984 from the Department of Electrical Engineering National Defense Academy where he completed the graduate program in 1989. At present he is a Research Associate. He has been engaged in research on the propagation and scattering of the electromagnetic waves. Received his B.S. (equivalent) degree in Electrical Engineering from the National Defense Academy of Japan in 1970 his M.S. and Ph.D. degrees from the Polytechnic Institute of New York (presently the Polytechnic University) Farmingdale NY in 1975 and 1978 respectively and a Dr. of Eng. degree from Tohoku University Sendai Japan in 1983. From June to December 1978 he was a Research Fellow of the Polytechnic Institute of New York. From January 1979 to March 1982 he was with the Defense Research Center of the Defense Agency. In April 1982 he became a Lecturer at the National Defense Academy. From September 1984 through February 1985 he was a Visiting Scholar at the Polytechnic Institute of New York. In 1985 he became an Associate Professor at the National Defense Academy where he was promoted to Professor in 1990. He has been engaged in research on propagation and scattering of electromagnetic waves and acoustic waves. He is a member of the IEEE the Acoustic Society of Japan the Applied Physics Society and the Ocean Acoustic Society.

An asymptotic method of analysis is studied for the radiation field when the lowest-order whispering gallery (WG) modes propagating from the concave side of the concave-to-convex boundary with a variable radius of curvature are radiated into the free-space on the convex side. The modal ray congruences of the WG mode are radiated into the free space after being converted to geometrical rays. Both the caustics and the shadow boundaries are created in the space. As the expression of the radiated field near the caustic, the modal rays incident into the concave part are used for deriving the physical optics integral. By applying the high-frequency asymptotic analysis in the case of two saddle points closely spaced to the evaluation of the integral, the uniform asymptotic solution was derived. Also, as the radiating field on the sufficiently shadow side of the caustic, the complex ray solution was derived. On the other hand, as the radiating field in the transition region near the shadow boundary caused by the convex region, an asymptotic solution was derived in the form of an extension of the conventional UTD (Uniform GTD) to the case where the geometrical ray converted from the modal ray is incident to the boundary. The numerical results obtained by various asymptotic expressions are compared with the reference solution and the geometrical optics figure drawn by the modal ray tracing. The effectiveness of the asymptotic solution and the propagation and radiation phenomena of the WG mode were derived.

关键词： whispering-gallery mode concave-to-convex boundary radiating field high-frequency asymptotic analysis modal ray

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Problem resolution during life cycle maintenance: A case study

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NAVAL ENGINEERS JOURNAL 1996年第3期108卷 171-177页

作者： Kerchner, RJ Bailey, J McCarthy, M Seegal, RH Warpinski, J Wilson, J Robert Kerchner:is currently working as a senior test engineer on the Surface Ship Torpedo Defense System and the AN/SQQ-89 ASW Combat System for Signal Corporation. Previously he was working as a system test engineer on the AN/SQQ-89 and AN/BSY-2 Combat Systems for GE Aerospace based in Syracuse N. Y. He received his B.S. degree in Physics from Westminster College. John Bailey:is currently working as a software engineer for the Multi-Sensor Torpedo Recognition and Alertment Processor and the AN/SQS-53C subsystem for Westinghouse Electric Corp. Previously he was working as an electrical engineer on the Longbow and APG-66 Mid Life Update programs. He received his B.S. degree in Electrical Engineering degree from Virginia Tech in 1987. He is currently working on his M.S. degree in Computer Science at Johns Hopkins University. Mike McCarthy:is currently working as a system test engineer for the passive subsystem COTS replacement for the AN/SQS-53C. Previously he was working as a system test engineer developing integration and functional tests for the MK116 Mod 7 and AN/SQS-53C subsystems for GE Aerospace based in Syracuse N. Y. He received his B.S. degree in Electrical & Computer Engineering from Clarkson University. Bob Seegal:is currently working as a systems engineer for the AN/SQQ-89 Combat System for Westinghouse Electric Corp. He has spent the past thirty years as a systems engineer working on various active and passive sonars which include the BQS-6 SQS-56 SQQ-32 and AN/SQS-53C systems. He received his B.S. degree in Applied Math from Brown University and an M.A. degree in Physics from Columbia University. Jeanne Warpinski:is currently working as a lead software engineer for the AN/SQQ-89 Combat System at the Naval Undersea Warfare Center at New London CT. She has spent the last ten years as a software engineer and configuration management specialist for the AN/SQR-19 AN/SQQ-28 and AN/SQS-53C subsystems. She received her B.S. degree in Computer Science from the University of Wisconsin. Jerry Wilson:is c

This paper is a case study of how problem resolution can operate in the life cycle maintenance stage of a large tactical sonar system. Here, the system design agent is not the original designer, so the principles of operation, hardware and software architecture, and test tools need to be learned. To deal with this challenge, the system design agent evolved a team approach that integrates the talents of a program manager, a system engineer, a test engineer, and a software engineer to analyze fleet problems. This team has proven effective at localizing problems for repair. Lessons are drawn to further improve maintenance efficiency.

关键词： Electronic ship equipment

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OPTICALLY CONTROLLED PHASED-ARRAY RADAR RECEIVER USING SLM SWITCHED REAL-TIME DELAYS

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IEEE MICROWAVE AND GUIDED WAVE LETTERS 1995年第11期5卷 414-416页

作者： FETTERMAN, HR CHANG, Y SCOTT, DC FORREST, SR ESPIAU, FM WU, M PLANT, DV KELLY, JR MATHER, A STEIER, WH OSGOOD, RM HAUS, HA SIMONIS, GJ Department of Electrical Engineering University of California Los Angeles Los Angeles CA USA Advanced Technology Center for Photonics and Optoelectronic Materials Princeton University Princeton NJ USA Department of Electrical Engineering McGill University Montreal Canada Liquid Crystal Institute Kent University Kent OH USA Department of Electrical Engineering University of Southern California Los Angeles CA USA Department of Electrical Engineering and Applied Physics Columbia University NY USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA Army Research Laboratory Adelphi USA

We report the results of a demonstration of a real time delay, optically controlled phased array radar receiver. This implementation employed a free space configuration based upon an optical switching network using liquid crystal spatial light modulators (SLM's). A three-delay unit, two-antenna array receiver was implemented at an optical wavelength of 1.3 mu m and demonstrated ''squint-free'' operation over the entire X-band (8-12 GHz) with an angular accuracy of 1.4 degrees. Finally, a novel configuration for the two-antenna element SLM architecture was proposed and demonstrated equivalent system performance with a reduction in the number of components.

关键词： Optical control Optical receivers Phased arrays Optical arrays Laser radar Optical modulation Optical network units Delay effects Optical fiber networks Liquid crystals

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A comparative study of pulsed Nd:YAG and CO laser effect on aortic valves

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Technology and Health Care 1995年第1期3卷 53-60页

作者： Yova, D. Kassis, K. Agapitos, E. Kavantzas, N. Koutsouris, D. National Technical University of Athens Department of Electrical and Computer Engineering Laboratory of Biomedical Engineering and Applied Biophysics Athens Greece National Technical University of Athens Department of Physics Athens Greece Medical School Department of Pathology University of Athens Athens Greece

Laser angioplasty is a promising new technology, which sometimes offers the surgeon an alternative tool to conventional therapy. One of the main prerequisites of using powerful pulsed lasers in angioplasty is the optimum choice of the irradiation parameters (the wavelength, the pulse shape and duration, the energy parameters). Infrared lasers have numerous applications in surgery. Among them the pulsed CO₂ laser emitting at 10.6 μm and the pulsed Nd:YAG laser emitting at 1.064 μm are the most widely used, since the delivery of laser energy in short pulses of high peak pulse power limits distant thermal effects. The CO₂ laser wavelength is greatly absorbed by tissue water, while the Nd:YAG laser wavelength is poorly absorbed by water or other tissue chromophores, affecting deeper the tissue. The CO₂ laser incises effectively the tissue, but presents inadequate coagulation, while the Nd:YAG laser seems to present better coagulation properties. In this work, a comparative study of pulsed Nd:YAG and CO₂ lasers in ablating cardiovascular tissue, is presented. The irradiation regime of the two lasers is determined, for the specific tissue and/or pathology. Also the depth of thermally induced coagulation is measured. The results are presented according to the efficacy of each laser for incision and/or coagulation. © 1995 IOS Press. All rights reserved.

关键词： Aortic valves decalcification CO2 laser Laser angioplasty Nd:YAG laser

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