| Laser Communications |
97 |
10 pages |
| Authors:
V. Chan; Gary Chambers; ARMY SPACE AND STRATEGIC DEFENSE COMMAND HUNTSVILLE AL
|
 | Ballistic Missile Defense Organization (BMDO) is developing advanced greater than 1 Gigabit per second data rate, anti-jam, low probability of intercept laser communication crosslinks between satellites and among Theater Missile Defense (TMD) and National Missile Defense (NMD) communications networks on the ground and in the air. Technology efforts are on-going in the following areas: ultra-stable laser sources, wide field of view acquisition and tracking, novel beam steering concepts, spatially incoherent ... |
|
| Ultrafast Broadband Photodetectors for High-Tc Superconductive Optoelectronics |
1997 |
12 pages |
| Authors:
Roman Sobolewski; Philippe M. Fauchet; ROCHESTER UNIV NY DEPT OF ELECTRICAL ENGINEERING
|
| Experimental research has been conducted to demonstrate the potential of the high-temperature superconductors (HTS) for optoelectronics. We performed systematic characterization of femtosecond optical response of superconducting YBa2Cu3O(x) (YBCO) thin films. We measured, for the first time, 1.5-ps-wide photoresponse signals from an epitaxial YBCO film irradiated with 150 fs optical pulses. Our results shed new light on the nonequilibrium carrier dynamics in HTS, as well as convincingly demonstrated that these materials ... |
|
| Organic Thin Films for Photonics Applications. Volume 14 |
1997 |
270 pages |
| Authors:
David W. Hennage; OPTICAL SOCIETY OF AMERICA WASHINGTON DC
|
| The meeting was held in Long Beach, CA on Oct 15-17, 1997. A Total of twelve technical sessions plus a poster session was held. The number of presentation and posters totaled over fifty. The sessions covered topics including Interconnects, Poling and Relaxation, Third Order Effects, Emissive Effects, Optical Limiting, Polymer Optical Fibers, Electro-Optic Materials, Second Order Effects, EO Devices and Photorefraction. |
|
| The Information Age: An Anthology on Its Impact and Consequences |
1997 |
312 pages |
| Authors:
David S. Alberts; Daniel S. Papp; OFFICE OF THE ASSISTANT SECRETARY OF DEFENSE WASHINGTON DC COMMAND AND CONTROL RESEARCH PROGRAM (CCRP)
|
| This first of 2 volumes examines some of the broader issues of the Information Age: what the Information Age is; how it affects commerce, business, and service; what it means for the government and the military; and how it affects the international system. Contributions are as follows: "Welcome to the Revolution," by Thomas A. Stewart; "Historical Impacts of Information Technologies: An Overview," by Daniel S. Papp, et al.; "The Technologies ... |
|
| Advanced Signal Processing Techniques for Wireless Communications |
17 DEC 96 |
4 pages |
| Authors:
Gregory W. Wornell; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| Efficient solutions fundamental problems of wireless communication continued to be explored during this period. This has included our work on developing promising new and bandwidth efficient classes of time, frequency, and space diversity strategies for single and multiuser wireless communication in multipath fading environments. A particular focus during this reporting period has been on techniques for exploiting transmitter antenna arrays to combat the effects of fading in wireless systems, and ... |
|
| Night Vision Goggle Assessment Techniques with Incompatible Cockpit Lighting and a Modified Class B Goggle |
DEC 96 |
|
| Authors:
Randall W. Gibb; ARIZONA STATE UNIV TEMPE
|
 | Visual acuity (VA) is the standard form of measuring visual performance among pilots in the U. S. Air Force. Yet, during cockpit light evaluations using night vision goggles (NVGs), it has been noted that VA remains constant despite noticeable loss in apparent visual contrast. Therefore, contrast sensitivity (CS) may be a useful measure of visual performance under degraded viewing conditions. The objective of this research was to demonstrate that CS ... |
|
| Predistortion of Quadrature Amplitude Modulation Signals Using Volterra Series Approximation |
DEC 96 |
96 pages |
| Authors:
Michael T. Donovan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Modern digital communication systems are being called upon to move ever increasing amounts of information over decreasingly available bandwidth. This requires that communication systems employ bandwidth-efficient modulation schemes to conserve bandwidth while moving the information at higher data rates. A major stumbling block to using higher order modulation schemes in long haul communication is the distortion caused by high power amplifiers. These high power amplifiers are required to amplify the ... |
|
| Data Inaccuracy in the Global Transportation Network |
NOV 96 |
99 pages |
| Authors:
David M. Young; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Desert Shield/Storm refocused the need for the Department of Defense to develop an effective Total Asset Visibility (TAV) plan. As part of that plan, USTRANSCOM was given the responsibility for the in-transit visibility (ITV) portion. To meet the goal of ITV, USTRANSCOM has developed the Global Transportation Network (GTN). The GTN system is very dependent on accurate data. In the past, GTN has been plagued with inaccurate or incomplete data. ... |
|
| Development and Testing of Tagging and Attachment Equipment for Harbour Porpoises in the Southwestern Bay of Fundy |
31 OCT 96 |
|
| Authors:
Andrew J. Read; William A. Watkins; Andrew J. Westgate; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| This report outlines work performed during 1995-6 under ONR grant NOOOI4-94-1-1 189 entitled 'Development and testing of tagging and attachment equipment for harbour porpoises in the southwestern Bay of Fundy'. The objectives were to: (1) test long-term tag attachment systems for harbour porpoises, (2) monitor the movements of harbour porpoises using satellite telemetry and (3) collect data on the postmortem cooling rates of harbour porpoises. We deployed satellite-linked transmitters (PTTs) ... |
|
| Integrated Helmet Audio Visual System Final Report Briefing |
03 OCT 1996 |
62 pages |
| Authors:
Donald Chapman; Jim Derdall; Brian Corey; PROGRAM EXECUTIVE OFFICER JOINT STRIKE FIGHTER ARLINGTON VA
|
| This report evaluates HMD weapon sensor imagery on HMD weapon delivery potential, evaluates performance, and evaluates 3-D audio threat management. |
|
| Simulation and Analysis of a Wireless Mac Protocol: MACAW |
SEP 96 |
|
| Authors:
Tufan Oruk; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| MACAW (Medium Access Collision Avoidance Wireless) is a new MAC protocol for wireless LANs proposed by Bharghavan et al. Ref. 2 based on Karn's MACA protocol Ref.3. In this thesis the performance characteristics and operational behavior of the protocol are investigated The approach taken was to simulate the protocol by OPNET 2.4c of MIL3, Inc. and determine the utilizations and mean delay times of the transmitters under various operational conditions. ... |
|
| Bit Error Rate Testbed for Multigigabit Optical Communication Network and High Performance Optoelectronic Devices |
29 AUG 96 |
5 pages |
| Authors:
Geoffrey W. Taylor; Eric Donkor; CONNECTICUT UNIV STORRS DEPT OF ELECTRICAL AND SYSTEMS ENGINEERING
|
| The opto-electronic development program has moved forward substantially during the last year. In the 100GHz receiver program with Wright Patterson Air Force Base, new approaches to the implementation of high speed lasers and detectors have been devised. These structures include transmission lines with phase velocities matched to the group velocity of the optical waveguide to eliminate the limitation of the device capacitance and output impedance. A new process sequence has ... |
|
| A Multicast User Directory Service for Synchronous Rendezvous |
26 AUG 1996 |
74 pages |
| Authors:
Eve M. Schooler; CALIFORNIA INST OF TECH PASADENA DEPT OF COMPUTER SCIENCE
|
| Teleconferencing capabilities are becoming increasingly accessible to the av- erage user of the Internet and are enabling users who are distributed across the network to collaborate synchronously, i.e., in real-time. The pervasiveness of this technology relies on the maturation of an infrastructure that more fully supports synchronous rendezvous. Toward this end, we have focused on one facet of the infrastructure, user location. This d%apter presents the context for this work ... |
|
| High Gain, Low Noise and Broadband Raman and Brillouin Fiber-Optic Amplifier, Channel Selectors and Switches |
AUG 96 |
36 pages |
| Authors:
Chung Yu; NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO DEPT OF ELECT RICAL ENGINEERING
|
| Wavelength independent Raman (sRs) and Brillouin (sBs) scattering processes in singlemode fibers have been exhaustively investigated for optical amplification - key to channel selection and switching in optical communication. The low gain and high pump threshold of sRs and the high gain, low pump threshold, but extremely narrowband sBs prevented further consideration of these processes for possible optical device fabrication for communication. Fiber rings have been employed to attempt to ... |
|
| Waiting Times When Service Times are Stable Laws: Tamed and Wild |
AUG 96 |
31 pages |
| Authors:
Donald P. Gaver; Patricia A. Jacobs; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
|
| Modern telecommunication systems must accommodate tasks or messages of extremely variable time duration. Understanding of that variability, and appropriate stochastic models are needed to describe the resulting queues or buffer contents. To this end, consider an M/G/1 queue with service times having a positive stable law distribution. Such service times are extremely long (and short) tailed, and thus do not have finite first and second moments; classical queue-theoretic results do ... |
|
| Microwave Impedance Matching of Photodiodes for High Speed Optical Communications Systems |
JUL 96 |
39 pages |
| Authors:
David A. Sumberg; SUMBERG (DAVID A) CONSULTANTS ROCHESTER NY
|
| The performance of optical communications systems can be influenced by the mismatch between the low impedance laser source and the high impedance generator. A procedure is described here for matching a laser diode to a 50 ohm generator by means of a lossless equalizer network. The equalizer network is realized in the form of a microstrip adaptation of a ladder network consisting of inductor and capacitor equivalents. The mathematical model ... |
|
| Inverted Optical Modulators for Communications Networks |
JUL 96 |
31 pages |
| Authors:
N. Peyghambarian; ARIZONA BOARD OF REGENTS TUCSON
|
| The design and fabrication of a Kerr Lens Modelocked (KLM) chromium- doped forsterite laser is described. The KLM forsterite laser allows the study of ultrafast optical and electronic properties of materials in the near-IR with femtosecond time resolution. In particular, the laser produces sub-200 femtosecond pulses (tunable between 1240 and 1285 nm) with 2 kw of peak power at a 93 MHz repetition rate. The KLM forsterite laser was used ... |
|
| Ten-Inch Glass Ball ARGOS Transmitter using Seimac Ltd. Platform Terminal Transmitter |
JUL 96 |
|
| Authors:
Scott E. Worrilow; Kenton M. Bradshaw; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| This is a description of the design and motivation for the newest generation of submersible ARGOS transmitters currently used by the Subsurface Mooring Operations Group at Woods Hole Oceanographic Institution as well as the general operations and assembly procedures. |
|
| U.S. Army Public Affairs During Operation Uphold Democracy |
07 JUN 96 |
154 pages |
| Authors:
Damian P. Carr; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| This study examines the role of U.S. Army Public Affairs during Operation Uphold Democracy in 1994 to see whether public affairs was effective. The study looks at Operation Uphold Democracy in the context of Haiti's history and the global media environment while looking at changes in the military-media relationships and evaluating the need for change in Army Public Affairs doctrine. Interviews of participants and the use of primary source documents ... |
|
| Development and Testing of Tagging and Attachment Equipment for Harbor Porpoises in the Southwestern Bay of Fundy |
07 JUN 96 |
|
| Authors:
William A. Watkins; Andrew J. Read; Damon P. Gannon; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| Abstract: During July, August and September of 1993 and 1994, we successfully employed time-depth recorders, VHF transmitters and satellite- linked transmitters in a study of the diving behavior and habitat utilization of harbor porpoises in the Gulf of Maine and Bay of Fundy. A total of 190.4 hours of diving behavior (6002 dives) was recorded by time-depth recorders placed on four porpoises. Mean dive depths were between 22 + 23 ... |
|
| The Troubled Path to the Pentagon's Rules on Media Access to the Battlefield: Grenada to Today |
15 MAY 96 |
64 pages |
| Authors:
Pascale Combelles-Siegel; ARMY WAR COLL STRATEGIC STUDIES INST CARLISLE BARRACKS PA
|
| The author examines the relationship between the military and the media since the early days of the Vietnam War and analyzes the factors contributing to the mistrust that grew between the armed forces and the press. The author focuses on the development of the 1992 Joint Doctrine for Public Affairs as a practical tool for reducing tension and providing press access to the battlefield. In the information age, media coverage ... |
|
| Yugoslavia: Did The Media Formulate U.S. Foreign Policy? |
MAY 96 |
36 pages |
| Authors:
Michael T. Triplett; ARMY WAR COLL CARLISLE BARRACKS PA
|
| For almost four years the international community could not reach a consensus for a regional Balkan policy after the disintegration of the Former Yugoslavia (FY). As a result, the media, principally the U.S. television media, attempted to exercise decisive influence on political decision makers and on military and humanitarian organizations in Bosnia. This paper will show how the media, intentionally or unintentionally, attempted to influence foreign policy. This paper will ... |
|
| Physics and Applications of Coherently Coupled Phase Conjugators |
MAY 96 |
161 pages |
| Authors:
I. McMichael; ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
|
| This contract focused on the physics and applications of coherently coupled phase conjugators. Of particular interest is the physics of mutually pumped phase conjugation (MPPC) and its application to wavefront matched heterodyne communications. This application requires a nonlinear optical Kerr media that is capable of high gain. Under this contract we demonstrated a beam coupling gain of 22 times by the process of nondegenerate two wave mixing in a crystal ... |
|
| Collaboratory and Telecommunications Experiments |
MAY 96 |
188 pages |
| Authors:
Roman Markowski; Geoffrey Fox; SYRACUSE UNIV NY NORTHEAST PARALLEL ARCHITECTURES CENTER
|
| The objectives of this effort were to: (1) determine the appropriate distributed collaboration technologies for NYNet (an experimental, high speed network in New York State) applications; (2) prototype a Mosaic based infrastructure for delivering collaboratory information; (3) implement collaborative technology within the area linked by the NYNet ATM (Asynchronous Transfer Mode) network; and (4) demonstrate the capabilities of the multimedia collaboratory technology over an ATM network by means of a ... |
|
| A Wavelength Division Multiplexed Fiber-Optic Communication System |
APR 96 |
|
| Authors:
Vijaysekhar Jayaraman; OPTICAL CONCEPTS INC LOMPOC CA
|
| This report summarizes the technology developed by Optical Concepts during BMDO SBIR contract DASG60-94-0022. This material presented here is a condensed version of what is described in greated detail in the 8 quarterly reports submitted during this program. In this program, Optical Concepts has developed a technology for fabricating wavelength-division multiplexed (WDM) arrays of long-wavelength vertical cavity surface-emitting lasers (VCSELs) operating norminally at 1550 nm. Prior to this program, 1550 ... |
|
| Transport Flow Control and Connection Admission Policies for Reliable Applications |
APR 96 |
|
| Authors:
Louise Lamont; Ilka Miloucheva; Wolfram Sterling; COMMUNICATIONS RESEARCH CENTRE OTTAWA (ONTARIO)
|
| The purpose of this report was to determine transport protocol performance characteristics over high speed trans-Atlantic ATM connections, using national High Speed Test Networks and Teleglobe's trans-Atlantic submarine fibre CANTAT-3. The measurements focus on TCP/IP's flow control parameters and mechanisms for Quality of Service (QOS) provision (throughput, response time) to bulk data and transaction applications. Practical issues of TCP/IP over Long Fat Networks (LFN) (trans-Atlantic ATM) are investigated and compared ... |
|
| Acquisition of Telecommunications Equipment and Services by the Naval Computer and Telecommunications Station, San Diego |
29 MAR 1996 |
37 pages |
| Authors:
Thomas F. Gimble; Salvatore D. Guli; Robert M. Murrell; Consolacion L. Loflin; Kyle M. Franklin; INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
|
| The objectives were to evaluate the telecommunications requirements for the CATS II contract and to evaluate the adequacy, efficiency, and effectiveness of Naval Computer and Telecommunications Station, San Diego, management procedures for providing telecommunications services at the Naval Postgraduate School, Monterey; Naval Station, Long Beach; and Naval Air Station El Centro, California. |
|
| Acoustics Local Area Network |
29 FEB 96 |
2 pages |
| Authors:
Michael G. Brown; H. DeFerrari; H. Nguyen; F. Tappert; J. Willemsen; MIAMI UNIV FL
|
| The purpose of this contract was to provide a shared computing resource - the acoustics local area network (ALAN) - to support ocean acoustic and related oceanographic research at RSMAS, University of Miami. Co-PI's on this contract, and principal ALAN users, were Drs. M. Brown, H. DeFerrari, H. Nguyen, F. Tappert, J. Willemsen and T. Yamamoto. The ALAN is built around a Unix based client/server architecture locally. The ALAN is ... |
|
| Figures of Merit and Performance Specifications for the IHADSS and ANVIS |
FEB 96 |
25 pages |
| Authors:
Thomas H. Harding; Howard H. Beasley; John S. Martin; Clarence E. Rash; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The U.S. Army currently fields two helmet mounted display systems. These are the Integrated Helmet and Display Sighting System (IHADSS), which is employed on the AH-64 Apache, and the Aviator's Night Vision Imaging System (ANVIS), which is employed on all U.S. Army rotary wing aircraft. The performance and figures of merit specifications provide the basis for judging performance of future aviation electrooptical devices. This paper specifies in summary form performance ... |
|
| Delivery of a Fiber Optic Cable Repair Course by Videoteletraining. |
JAN 1996 |
123 pages |
| Authors:
C. D. Wetzel; Paul H. Radtke; Steven W. Parchman; George E. Seymour; NAVY PERSONNEL RESEARCH AND DEVELOPMENT CENTER SAN DIEGO CA
|
| The feasibility of using videoteletraining (VTT) to deliver a hands- on laboratory course on fiber optic cable repair was evaluated to explore the potential for extending the use of VTT beyond lecture based courses. Three treatment groups were compared with a total of 50 students: (1) traditional classrooms, (2) VTT local classrooms with an instructor and students, and (3) VTT remote classrooms where students were connected to the local classroom ... |
|
| Eye-Safe 2-Micron Laser Communications System |
JAN 96 |
93 pages |
| Authors:
Gary D. Wilkins; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| This paper summarizes the Wright Laboratory In-house Laboratory Independent Research (ILIR) conducted to develop an eye safe laser communication system which is minimally affected by atmospheric turbulence and absorption. Details concerning the 8 kilometer pulsed laser communications link established between the Wright-Patterson AFB Trebein site and Area B, building 620, Laser Communications Laboratory (LCL) are described. |
|
| Congestion-Oriented Shortest Multipath Routing |
1996 |
10 pages |
| Authors:
Shree Murthy; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| The authors present a framework for the modeling of multipath routing in connectionless networks that dynamically adapt to network congestion. The basic routing protocol uses a short-term metric based on hop-by-hop credits to reduce congestion over a given link, and a long-term metric based on end-to-end path delay to reduce delays from a source to a given destination. A worst-case bound on the end-to-end path delay is derived under three ... |
|
| Process Value Estimation at Pacific Bell |
DEC 95 |
74 pages |
| Authors:
John D. Pickering; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this thesis is to demonstrate the implementation of the Process Value Estimation methodology now being pioneered at Pacific Bell. The principles of Process Value Estimation are applied to the Network Surveillance Division of Pacific Bell in a field study. There are two main component processes of Network Surveillance. Classification is an automated process, and Decision Making is a manual process. The thesis uses Process Value Estimation to ... |
|
| A Survey of 10th Mountain Division (Light) Soldiers Who Deployed to Operation Uphold Democracy to Determine the Importance, Availability and Use of News and Media Resources |
27 NOV 95 |
102 pages |
| Authors:
Jenelle B. Roberts; MARSHALL UNIV HUNTINGTON WV W PAGE PITT SCHOOL OF JOURNALISM AND MASS COMMUNI CATIONS
|
| The majority of research in the area of mass communication regarding the military falls into the area of public information. Public information deals with information passed to external audiences via the civilian news media. The purpose of this research is to survey the soldiers of the 10th Mountain Division (Light) who deployed in Operation Uphold Democracy to determine the value of news to them and how much, how often, what ... |
|
| Domestic Use of Telemedicine Technology: Lessons Learned From Initial Consultations |
30 OCT 95 |
11 pages |
| Authors:
Itzhak Jacoby; UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD
|
| Twenty-one patients presenting to the Dunham U.S. Army Health Clinic (DUSAHC) were evaluated by specialists at Walter Reed Army Medical Center (WRAMC) between June 1-30, 1995, using videoconferencing technology (Telemedicine). The project involved DUSAHC physicians and physicians' assistants, consulting physicians at WRAMC, Mystech computer system developers, WRAMC support staff, DUSAHC support staff, and a data gatherer from the Uniformed Services University of the Health Sciences (USUHS). Following a May 19 ... |
|
| Consolidated Area Telephone System-San Francisco Area |
23 OCT 1995 |
26 pages |
| Authors:
Thomas F. Gimble; Salvatore D. Guli; Robert M. Murrell; Annie L. Sellers; Consolacion L. Loflin; INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
|
| We performed the audit in response to a complaint to the Defense Hotline. The Hotline case was initially assigned to the Inspector General, Defense Information Systems Agency, but was referred to the Inspector General, DoD, on September 14, 1994. The complainant alleged that AT&T (formerly the American Telephone and Telegraph Company) excessively charged for telecommunications equipment and services for the Navy Public Works Center ... |
|
| Protocol Engineering for Multimedia Communications |
20 OCT 95 |
163 pages |
| Authors:
Ming T. Liu; OHIO STATE UNIV COLUMBUS DEPT OF COMPUTER AND INFORMATION SCIENCE
|
| The final summarizes the research results obtained, covering five areas in protocol engineering for multimedia communications. The five area are (1) protocol conversion, (2) conformance testing, (3) multimedia protocol design, (4) LANs extension, and (5) mobile communication. For each area of research, the problems under investigation are first described, and then the major results obtained are summarized. A total of 31 publications, including 5 Ph.D. dissertations, 7 journal publications and ... |
|
| The Development and Application of a Cost per Minute Metric for the Evaluation of Mobile Satellite Systems in a Limited-Growth Voice Communications Market |
20 SEP 95 |
278 pages |
| Authors:
Michael D. Violet; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| A computer model has been developed to estimate the billable capacity of five mobile satellite services (MSS) designs at different levels of market penetration. To evaluate their effectiveness when operating in a limited market, the billable capacity for each system has been determined at 10% and 31% of the expected market. Life cycle costs have been estimated for each of the systems to address the market over a twelve year ... |
|
| Muscle Activity and Fatigue During Push-Ups Performed by Women: An Electromyographic and Videographic Analysis of 15 Muscles |
01 SEP 95 |
13 pages |
| Authors:
Michael D. Robinson; WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
|
| The purpose of this study was to establish the firing patterns of 15 muscles in the upper extremtry and shoulder girdle of healthy female subjects during performance of the pushup. Dynamic, fine wire intramuscular electromyography was carried out in 67 healthy female volunteers. 30 women had barely passed the pushup event on the APFT within the past 6 months. 37 women had achieved a maximal or near maximal score on ... |
|
| Ultra-High Speed Optical Communication and Switching via Novel Quantum Devices |
SEP 95 |
60 pages |
| Authors:
Horace P. Yuen; Prem Kumar; Sen-Tiong Ho; NORTHWESTERN UNIV EVANSTON IL DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCI ENCE
|
| A joint theoretical experimental research program was undertaken to initiate the development of novel quantum devices for greatly improved optical communication and switching in both local network and long haul applications. Specifically, Northwest University theoretically investigated and experimentally realized novel quantum amplifiers (phase sensitive linear amplifiers and photon number amplifiers) and ultrafast all optical switches that would lead to the development of ultrahigh speed ... |
|
| Ion Doped Quantum Well Lasers |
SEP 95 |
56 pages |
| Authors:
Anton Greenwald; SPIRE CORP BEDFORD MA
|
| The objective of this research was to fabricate erbium doped diode lasers which were expected to be temperature independant, frequency stable sources of 1538 nm light optical communications. New metaloorganic sources of erbium were developed that enabled metaloorganic chemical vapor deposition (MOCVD) of Br:GaAs and AlGaAs structures with low levels of carbon and oxygen. Substitutional doping levels to over 10(exp20) per cubic centimeter were demonstrated with good photo- and cathode-luminesce ... |
|
| Identifying Measures of Effectiveness for Marine Corps C4I Systems |
SEP 95 |
111 pages |
| Authors:
Douglas E. Mason; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The author presents the results of an extensive literature review and survey analysis conducted to identity, compare, and contrast various C4I evaluation techniques and existing C4I measures of effectiveness (MOEs). Evaluation methodologies examined include the Cost and Operational Effectiveness Analysis, the Modular Command and Control Evaluation System (MCES), the Mission Oriented Approach (MOA), the Headquarters Evaluation Analysis Tool, Evolutionary Upgrade Paths, and Functional Decomposition methods. Existing MOEs from past military ... |
|
| National Hotline Expansion |
SEP 95 |
68 pages |
| Authors:
Roy W. Hardy; EDISON MATERIALS TECHNOLOGY CENTER KETTERING OH
|
| The Heat Treating Network's HOTLINE was developed in response to the immediate technical needs of commercial heat treaters and users of heat treating. The original HOTLINE was a regional (state of Ohio) communications network. The HOTLINE's purpose is to provide responsive (real time) solutions to short term problems. Specifically, problems which can primarily be solved without requiring face-to-face interaction. This includes names of suppliers, contacts for parts and services, and ... |
|
| Wireless Technologies and the National Information Infrastructure |
SEP 95 |
291 pages |
| Authors:
OFFICE OF TECHNOLOGY ASSESSMENT WASHINGTON DC
|
| Over the next five to 10 years, wireless technologies will dramatically reshape the communications and information infrastructure of the United States. New radio-based systems now being developed will use advanced digital technologies to bring a wide array of services to both residential and business users, including ubiquitous mobile telephone and data services and many new forms of video programming. Existing wireless systems, including radio and television broadcasting, cellular telephony, and ... |
|
| Indirect Measurement of Head Orientation During Gy Acceleration |
SEP 1995 |
21 pages |
| Authors:
Douglas S. Brungart; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| Although head-mounted technologies have the potential to significantly enhance pilot performance, they increase the mass of the helmet considerably and may increase the risk of cervical injury during emergency ejection. The lack of adequate head restraint makes the prediction of cervical injuries more complicated than other spinal injuries because the position of the head during the acceleration is unknown. A retroactive study of data from +Gy impacts of instrumented human ... |
|
| Multi-Gb/s Computer Interconnect Using Optical Solitons |
31 AUG 95 |
238 pages |
| Authors:
Jon R. Sauer; Mark J. Ablowitz; COLORADO UNIV AT BOULDER
|
| The following document presents the results of a two year study into the feasibility of using wavelength division multiplexed solitons for data communications. Timing jitter caused by nonlinear interactions between multiwavelength solitons was found to be a fundamental effect limiting the use of wavelength multiplexed solitons for data transmission. Such interactions can be described mathematically by a simple summation of all frequency shifts which occur during pairwise soliton collisions, and ... |
|
| Physical Evaluation of the Integrated Helmet and Display Sighting System (lHADSS) Helmet Display Unit (HDU) |
14 AUG 95 |
42 pages |
| Authors:
Thomas H. Harding; Howard H. Beasley; John S. Martin; Clarence E. Rash; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The Helmet Display Unit (HDU) of the Integrated Helmet and Display Sighting System (IHADSS) of the AH-64 Apache helicopter was evaluated to establish baseline data for performance figures-of-merit for comparison of fliture helmet mounted display designs. Measured parameters included physical and optical eye relief, exit pupil size, and position, field-of-view, luminance range, transmittance and reflectance characteristics, and static and temporal response. |
|
| An Investigation of the Channel Crosstalk in Optical Heterodyne Controlled Phased Array Radars |
01 AUG 95 |
4 pages |
| Authors:
Alan R. Mickelson; COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The principal objective of this project is to develop a calibrated simulation model which can accurately predict the effects on overall phased array system performance when conventional subsystems are replaced with optically assisted subsystems. Various components of single side band (SSB) modulator have been designed and fabricated. The designs used for this task employed a commercially available microwave design software (MDS) developed for the microwave components, while the optical modulators ... |
|
| Intersatellite Optical Communications Technology |
01 AUG 95 |
17 pages |
| Authors:
Zhao Zhaode; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| Optical communication between satellites involves the use of laser technology in communicating between satellites, and between satellites and earth station. Since the invention of the laser, there have been more than two decades of research and development of optical communications technology between satellites. The related experiments were conducted by the National Aeronautics and Space Administration in the United States, the European Space Agency, the Japanese consortium of Space Development, among ... |
|
| Telecommunications Technology and Native Americans: Opportunities and Challenges |
AUG 1995 |
132 pages |
| Authors:
OFFICE OF TECHNOLOGY ASSESSMENT WASHINGTON DC
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| 'Telecommunications Technology and Native Americans: Opportunities and Challenges' examines the potential of telecommunications to improve the socioeconomic conditions of Native Americans - American Indians, Alaska Natives, and Native Hawaiians - living in rural, remote areas, and to help them maintain their cultures and exercise control over their lives and destinies. The report discusses the opportunities for Native Americans to use telecommunications (including computer networking, videoconferencing, multimedia, digital and wireless technologies, ... |
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Non-radio Communications
