| Fiber Optic Curvature Sensor for Towed Hydrophone Arrays |
15 OCT 2001 |
20 pages |
| Authors:
Michael J. McGowan; NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI
|
 | The present invent ion relates to a system for sensing the curvature of a towed hydrophone array and a curvature sensor used in the system. The system has at least two curvature sensors positioned along the length of the array. Each of the curvature sensors comprises a bend member which bends as the array bends, at least one optical fiber within the bend member, and at least one detection device ... |
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| Optical Fiber Gratings Using Near-UV Light |
04 OCT 2001 |
27 pages |
| Authors:
Jack Feinberg; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CONTRACTS AND GRANTS
|
| Experiments were performed to elucidate the physical mechanism by which light alters the refractive index of germanium-doped optical fibers. It was found that loading the fiber with hydrogen turns on a separate physical mechanism so that all of the Ge atoms become photosensitive and not just the Ge defects. New experimental results explain the reduced stability of optical fibers and fiber gratings in the presence of hydrogen, as well as ... |
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| DURIP 00-01 Optical Fiber Gratings Using UV Light and IR Light |
04 OCT 2001 |
3 pages |
| Authors:
Jack Feinberg; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CONTRACTS AND GRANTS
|
| This is an "equipment only" grant under the Defense University Research Instrumentation Program. A report of the results obtained with this equipment is contained in the final report for Grant F49620-98-1-0051, "OPTICAL FIBER GRATINGS USING NEAR-UV LIGHT". To avoid duplication of paperwork, only a partial summary of that report will be duplicated here. This grant is to purchase equipment to further investigate the physical properties of optical gratings written inn ... |
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| Bragg Grating Fiber Optic Based Nondestructive Evaluation (NDE) |
SEP 2001 |
|
| Authors:
H. T. Yolken; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX
|
 | Fiber optic Bragg grating sensors coupled with a variety of demodulation or readout techniques offer an elegant means to monitor the processing or health of materials in a variety of applications. Laboratory research has demonstrated the feasibility of using fiber optic Bragg grating sensors to determine strain and temperature in structures, monitor the processing of composites, monitor adhesive joints, serve as chemical sensors and corrosion detection sensors, and to detect ... |
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| Proceedings of International Workshop on Amorphous and Nanostructured Chalcogenides - Fundamentals and Applications - (1st) Held in Bucharest, Romania on June 25-28, 2001. Part 2 |
SEP 2001 |
|
| Authors:
Mihai A. Popescu; NATIONAL INST OF MATERIALS PHYSICS BUCHAREST (ROMANIA)
|
| This is Part II of the Proceedings papers presented at the First International Workshop on Amorphous and Nanostructured Chalcogenides Fundamentals and Applications held in Bucharest, Romania June 25-28, 2001 |
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| Chiral Polymers for Optical Waveguides |
26 AUG 2001 |
10 pages |
| Authors:
W. N. Herman; G. A. Lindsay; D. Irvin; A. Guenthner; A. Chafin; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| Chiral polymers for optical waveguides is presented. |
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| Femtosecond Wavelength Division Multiplexed Interconnect Using Smart Pixel Technology |
AUG 2001 |
15 pages |
| Authors:
David A. Miller; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
| A short pulse based optical link was demonstrated. It was shown that the short pulse link can remove up to half a bit of skew and jitter from the transmitter. Optoelectronic devices were fabricated and integrated to silicon chips in-house. A first generation wavelength division multiplexed optical link with short pulses was demonstrated and a second generation wavelength division multiplexed optical link system is described. Results are also shown for ... |
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| Error Rate Measurement Instrumentation for Multiwavelength Optical Switching |
30 JUL 2001 |
14 pages |
| Authors:
Daniel J. Blumenthal; CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The equipment purchased under this DURIP grant is designed to generate high speed data for optical communications and network experiments. The ability to generate data using this type of instrument is essential to measure the performance of devices and systems and understand what the limitations are. This work resulted in 20 publications. which are listed at the end of this report. Four areas of research were positively impacted by the ... |
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| Hybrod Brillouin/Erbium Doped Fiber Amplifier Apparatus and Method |
30 JUL 2001 |
23 pages |
| Authors:
Shane J. Strutz; K. J. Williams; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A method and apparatus to enable the use of low cost high RIN optical sources for microwave photonic links by combining the wide-gain bandwidth and low cost of an EDFA, with the narrow gain bandwidth of a Brillouin amplifier. The hybrid Brillouin/EDEA ("hybrid amplifier") apparatus of the present invention includes at least two couplers, a phase modulator, an Erbium-doped fiber, a laser source to pump the Erbium fiber, an optical ... |
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| Theoretical Studies of Scaling Double Clad Fiber Lasers to High Power |
24 JUL 2001 |
64 pages |
| Authors:
Yuri Anan'ev; SAINT PETERSBURG STATE TECHNICAL UNIV (RUSSIA)
|
| Ytterbium (Yb) - doped fiber lasers have demonstrated efficient optical-to-optical continuous-wave power conversion into a diffraction-limited laser beam. Power scaling these devices has benefited from recent dual-clad fiber designs that specifically allow improved coupling of diodelaser emission and interaction with the Yb-doped core. To realize efficient, kilowatt- scaleable, Ytterbium-doped fiber laser designs many limiting factors must be better understood. The research on this project will consist of the theoretical study ... |
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| Amplification With Chalcogenide Glass Fiber |
12 JUL 2001 |
21 pages |
| Authors:
Leslie B. Shaw; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This invention pertains to an optical device and method for using a chalcogenide glass waveguide to amplify a pump light beam by means of stimulated Raman scattering and obtaining a depleted pump light beam and an amplified beam at a wavelength higher than the wavelength of the depleted pump light beam. |
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| Resaerch Investigation Directed Toward Extending the Useful Range of the Electromagnetic Spectrum |
30 JUN 2001 |
43 pages |
| Authors:
George W. Flynn; Richard M. Osgood Jr.; Louis E. Brus; Tony F. Heinz; Irving P. Herman; TRUSTEES OF COLUMBIA UNIV NEW YORK
|
| Experiments are described that have the goal of understanding the basic physics of quantum confined electronics. In the first experiment new fabrication processes for making GaSb-based quantum dots have been examined. The scientific goal of this work is to develop methods to realize damage free etching of the dots. In the second experiment stepped metal surfaces have been used to measure the scattering cross-sections of electrons at simple features, such ... |
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| Method for Protecting Optical Fibers Embedded in the Armor of a Tow Cable |
06 JUN 2001 |
16 pages |
| Authors:
Thomas R. Stottlemyer; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A method is disclosed for protecting optical fibers embedded in the armor of a tow cable. The method includes the steps of winding a resin-impregnated fiber onto a stainless steel tube, and curing the resin to form a hard protective filament shell around the stainless steel tube. The fiber is a continuous fiber and the step of impregnating is either in combination with the step of winding or prior to ... |
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| Fiber Optic Sensors for the Study of Spacecraft-Thruster Interactions: Ion Sputtering |
JUN 2001 |
12 pages |
| Authors:
Andrew D. Ketsdever; Brian M. Eccles; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
|
| The interaction between thruster effluents and spacecraft surfaces has received considerable attention recently. Historically, thruster interaction concerns have focused on self-contamination from non-direct and high angle (measured from the thruster centerline) plume impingement. The growing popularity of distributed networks of cooperative, co-orbiting satellite clusters has brought about an additional need to address direct plume impingement or cross-contamination. Typically, quartz crystal microbalances (QCMs) are used to investigate spacecraft-thruster interactions where the ... |
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| Chalcogenide Fibre Displacement Sensor |
JUN 2001 |
|
| Authors:
S. Miclos; T. Zisu; NATIONAL INST OF RESEARCH AND DEVELOPMENT FOR OPTOELECTRONICS BUCHAREST (ROMANIA)
|
| Fibre optic technology offers the possibility for developing of a variety of physical sensors for a wide range of physical parameters. The main advantage of fiber optic sensors lies in their dielectric construction, providing electrical isolation, immunity from electromagnetic fields, small dimensions, and compatibility with optical fibre technology. A large number of fiber sensors in production are based on intensity modulation of the light either outside the fiber or within ... |
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| A Framework for Managing Faults and Attacks in WDM Optical Networks |
Jun 2001 |
13 pages |
| Authors:
Jigesh K Patel; Sung U Kim; David H Su; Suresh Subramaniam; Hyeong-Ah Choi; NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD
|
| Fault and attack survivability issues concerning physical fiber security in all-optical transport networks (AOTNs) require a new approach taking into consideration AOTN physical characteristics. Furthermore, unlike in electronic networks that regenerate signals at every node, attack detection and isolation schemes may not have access to the overhead bits used to transport supervisory information between regenerators or switching sites to perform their functions. This paper presents an analysis of attack and ... |
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| High Power Fiber Optic Modulator System and Method |
27 APR 2001 |
24 pages |
| Authors:
Keith J. Williams; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An apparatus and method to increase the output power from LiNbO3 MZM style optical intensity modulating without exceeding the optical power damage threshold imposed by LiNbO3 is described. The optical path from a laser source is divided into two paths by a polarization maintaining (PM) coupler. The two paths form a Mach Zender Modulator (MZM) with a LiNbO3 phase modulator in one path and a fiber looped PZT in the ... |
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| System and Method for Determining the Temperature to Which a Structure is Subjected |
26 APR 2001 |
14 pages |
| Authors:
Anthony A. Ruffa; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A system and method is provided for determining the temperature to which a structure is subjected. An optical fiber having at least one pair of fiber sensors is attached to the structure. The fiber sensors comprise Bragg gratings and each is configured to have a particular coefficient of thermal expansion and be responsive to a particular wavelength. A broadband spectrum of light is launched into the optical fiber. The light ... |
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| Optical Characterization of Two-Dimensional Photonic Crystal Cavities with Indium Arsenide Quantum Dot Emitters |
16 APR 2001 |
4 pages |
| Authors:
Tomoyuki Yoshie; Axel Scherer; Hao Chen; Diana Huffaker; Dennis Deppe; CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We have characterized the modes within two-dimensional photonic crystal nanocavities with self-organized indium arsenide quantum dots as an active material. Highly localized donor mode resonances with 3 to 5 nm linewidth were observed when spatially selective optical pumping the cavities. These modes could be lithographically tuned from 1100 to 1300 nm. Other, more extended modes, were also characterized and exhibited narrower resonance line widths ranging from 0.6 to 2 nm. ... |
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| Novel Fabrication of Ultra-Strong Thermally Stable Gratings through the Coating of Optical Fibers with UV Light |
05 APR 2001 |
72 pages |
| Authors:
Dmitry Starodubov; Jack Feinberg; D-STAR TECHNOLOGIES INC MANHATTAN BEACH CA
|
| We optimize the properties and fabrication process of fiber Bragg gratings for sensors and for stabilization of semiconductor lasers. We investigate the effects of boron and titanium doping on thermal sensitivity. We find that gratings written through the polymer coating are stable to high- intensity infrared light traveling in the core of the fiber. These gratings are designed for wavelength locking of semiconductor lasers used for pumping erbium- doped fiber ... |
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| (STTR Phase II) Novel Fabrication of Ultra-Strong Thermally Stable Gratings through the Coating of Optical Fibers with UV Light |
05 APR 2001 |
9 pages |
| Authors:
Dmitry Starodubov; Jack Feinberg; D-STAR TECHNOLOGIES INC MANHATTAN BEACH CA
|
| We optimize the properties and fabrication process of fiber Bragg gratings for sensors and for stabilization of semiconductor lasers. We investigate the effects of boron and titanium doping on thermal sensitivity. We find that gratings written through the polymer coating are stable to high- intensity infrared light traveling in the core of the fiber. These gratings are designed for wavelength locking of semiconductor lasers used for pumping erbium- doped fiber ... |
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| Stanford Electronics Lab JSEP Contract |
31 MAR 2001 |
45 pages |
| Authors:
J. S. Harris; STANFORD UNIV CA STANFORD ELECTRONICS LABS
|
| This is the final report of the research conducted at Stanford Electronics Laboratories under the sponsorship of the Joint Services Electronics Program from March 1 1997 through March 31 2001. This report summarizes the areas of research. identifies the most significant results and lists the dissertations. publications and presentations sponsored by the contract DAAG55- 97-1-0115. |
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| Instrumented Fiber Optic Tow Cable |
20 MAR 2001 |
10 pages |
| Authors:
Anthony A. Ruffa; Thomas R. Stottlemyer; Peter E. Seaman; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An integrated fiber-optic tow cable is described having both optical fibers and armor wires located outside the cable core to avoid high strain on the optical fibers when the cables is under stress during deployment. The optical fibers have integral temperature sensors near the outermost portion in order to measure accurately the temperature of the fluid coming in contact with temperature sensors. A beam of light is shown on the ... |
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| Dispersion and Nonlinearity Characterization of a Mode-Locked Erbium- Doped Fiber Laser |
FEB 2001 |
33 pages |
| Authors:
James A. Louthain; Michael J. Hayduk; AIR FORCE RESEARCH LAB ROME NY SENSORSDIRECTORATE
|
| This report describes the results of dispersion and nonlinearity experiments of the components required for the development of picosecond passively mode-locked fiber lasers. First, we will summarize the interferometric dispersion measurement technique and results for short lengths of fiber (< 1 meter). We measured dispersion of standard fiber at 16.9 +/- 1.4 ps/nm and Er- doped fiber at 8.5 +/- 1.6 ps/nm at 1550 nm. Next, we measured the group ... |
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| Active Polymer-Glass Waveguide Devices for Ultra-Fast Photonic |
17 JAN 2001 |
7 pages |
| Authors:
Nasser Peyghambarian; David Mathine; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This program was for the demonstration and development of a new generation of ultra-high bandwidth optoelectronic switching devices based on an unique combination of ultra-low loss ion- exchanged glass integrated optical waveguide devices coated with highly efficient and ultra-high bandwidth electro- optic polymers. This innovative approach combines the complementary strength of inorganic and organic materials and is based on a new material processing technology. |
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| Long Gage Fiber Optic Bragg Grating Strain Sensors to Monitor Civil Structures |
2001 |
11 pages |
| Authors:
Whitten L. Schulz; Joel P. Conte; Eric Udd; BLUE ROAD RESEARCH FAIRVIEW OR
|
| Fiber optic Bragg gratings packaged in long gage configurations are being used to measure static and dynamic macro-strains in structures and structural models to monitor structural health and detect and identify macro- damage incurred from a seismic event. These long gage sensors are being used to experimentally verify analytical models of small-scale structural models in their pre- and post-damage states using system identification techniques. This fiber optic deformation measurement system ... |
|
| Laser-Based Ultrasound for Remote and Limited-Access Inspection Applications |
DEC 2000 |
112 pages |
| Authors:
Robert C. Addison Jr.; Andrew D. W. McKie; ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CA SCIENCE CENTER
|
| The design, implementation, and proof-of-concept demonstration of a fiber-based Cassegrain optical scanning system was completed. Optical generation and detection with the fiber-based Cassegrain optical scanning system over 100-m lengths of optical fiber was demonstrated. High peak power, Q-switched Nd:YAG laser pulses (>45 mJ/pulse at 532 nm) through optical fiber in a robust manner was successfully delivered. This program established the absolute thermoelastic generation efficiency for four different laser wavelengths and ... |
|
| Miniaturized 3-D Mapping System Using a Fiber Optic Coupler as a Young'sDouble Pinhole Interferometer |
30 NOV 2000 |
91 pages |
| Authors:
Timothy L. Pennington; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG
|
| Three-dimensional mapping has many applications including robot navigation, medical diagnosis and industrial inspection. However, many applications remain unfilled due to the large size and complex nature of typical 3-D mapping systems. The use of fiber optics allows the miniaturization and simplification of many optical systems. This research used a fiber optic coupler to project a fringe pattern onto an object to be profiled. The two outputs ... |
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| Numerical Simulation of Nonlinear Optical Fibers |
28 NOV 2000 |
76 pages |
| Authors:
Dennis Sullivan; IDAHO UNIV MOSCOW DEPT OF ELECTRICAL ENGINEERING
|
| This project focused on computer simulation in three major areas. The first two projects involve three-dimensional electro-magnetic simulation of the Maxwell equations. The third is quantum simulation via two-dimensional simulation of the Schroedinger equation. The first project resulted in a true three-dimensional simulation (of a pulse propagating in a nonlinear optical fiber. The second project resulted in a system for three-dimensional simulation of pulses propagating through conductive apertures for the ... |
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| Proceedings of the Forty-Ninth International Wire and Cable Symposium |
16 NOV 2000 |
|
| Authors:
INTERNATIONAL WIRE AND CABLE SYMPOSIUM INC EATONTOWN NJ
|
| The proceedings of the 49th International Wire and Cable Symposium, Atlantic City, NJ, November 13-16, 2000. |
|
| Proceedings of the International Wire and Cable Symposium (49th) Held at Atlantic City, New Jersey on 13-16 November 2000 |
16 NOV 2000 |
|
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS COMMANDFORT MONMOUTH NJ
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| High Power Mid-Infrared Generation with a Quasi-Phase Matched GaAs Guided-wave Optical Parametric Oscillator |
15 NOV 2000 |
37 pages |
| Authors:
J. S. Harris; M. M. Fejer; STANFORD UNIV CA
|
| As described in our original proposal, the goal of this project is to create a new type of engineered nonlinear optical material, orientation- patterned GaAs, and use it to demonstrate improved high-power coherent mid- infrared sources. Considerable effort has been devoted over the past decade to the development of mid-IR coherent sources based on nonlinear optical frequency conversion, e.g., optical parametric oscillator (OPOs), pumped by available high-power near-IR sources such ... |
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| Blast Initiation Detector Proof-Of-Concept Wind Tunnel Testing of Optical/Aeroshell Interface |
09 NOV 2000 |
14 pages |
| Authors:
Leo R. Gauthier Jr.; Louis A. Mattes; Christopher L. Eddins; JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
|
| Interceptors with fragmenting warheads that detonate in proximity to target vehicles are being used in missile defense tests. As part of this effort, it is necessary to be able to measure the performance of an interceptor during the endgame and it is preferable that the measurements be recorded independently from the interceptor telemetry. Target-based instrumentation and telemetry are used to provide this independent performance measurement. A Blast initiation Detector (BID) ... |
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| Time and Frequency Activities at the CSIR - National Metrology Laboratory |
01-Nov-2000 |
8 pages |
| Authors:
E L Marais; COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH PRETORIA (SOUTH AFRICA) NATIONAL METROLOGY LAB
|
| The Time and Frequency Laboratory of the CSIR-National Metrology Laboratory (CSIR-NML) is responsible for the maintenance and development of the national standards in time and frequency. Specific responsibilities include time and frequency, phase angle, fast electrical-pulse characterization, and time-interval measurements. The fiber-optics laboratory also resides within the Time and Frequency Laboratory. This paper will discuss the various activities within the Laboratory. |
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| Testbed for Multi-Wavelength Optical Code Division Multiplexing Based on Passive Linear Unitary Filters |
10 OCT 2000 |
2 pages |
| Authors:
Eli Yablonovitch; CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
|
| The bandwidth demanded for Internet traffic has been constantly growing in response to more bandwidth hungry applications such as high- resolution motion picture transmission. An optical fiber has about 10 tera-bits per second (Tbps) available bandwidth and is the ideal medium to link tomorrow's bandwidth hungry applications. The equipment purchased under this grant has permitted UCLA to purchase a number of broad-band optical components, including especially some unique code division ... |
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| Low-Noise WideBand Heterodyne Optical Array Receiver |
10 OCT 2000 |
19 pages |
| Authors:
Vinson L. Go; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A system and method is disclosed for detecting optical signals that is especially suitable for use with a fiber optic sonar transducer array. The system preferably uses two photodiodes with a frequency response matched to within one percent over a bandwidth of at least one Gigahertz to reduce common mode intensity noise. Preferably the two photodiodes are manufactured on the same semiconductor wafer to provide as closely identical properties as ... |
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| Optoelectronic Thz Impulse Ranging |
06 OCT 2000 |
9 pages |
| Authors:
Daniel R. Grischkowsky; OKLAHOMA STATE UNIV STILLWATER SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We have used our THz impulse range to measure the late time response of targets following excitation by a short THz impulse: (1) Our measurements on dielectric cylinders showed unprecedented agreement with theory in both the time and frequency domains and enabled the first direct experimental comparison for the predicted surface wave with exact numerical calculations as well a simple geometrical optics model. (2) Our measurements ... |
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| Photonics Circuits Technology for RF Photonics Systems |
OCT 2000 |
39 pages |
| Authors:
Paul K. Yu; S. S. Lau; W. X. Chen; A. R. Clawson; G. L. Li; CALIFORNIA UNIV SAN DIEGO LA JOLLA OFFICE OF CONTRACT AND GRANT ADMINISTRATION
|
| Optical transmission of analog RF signals is potentially useful in a number of applications including RF distribution systems. Such systems can be used in commercial CATV and wireless communications and in military communication and radar systems. With compatible components used at transmitters and receivers, analog fiber optic links suffer much less performance degradation than conventional coaxial cable links as the system bandwidth increases. In the ... |
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| In Vivo, Fiberoptic-Coupled Radiation Dose Verification System for Prostate Radiotherapy |
OCT 2000 |
45 pages |
| Authors:
Brian L. Justus; NAVAL RESEARCH LAB WASHINGTON DC
|
| A fiberoptic-coupled patient dose verification system has been successfully developed that can provide real-time dose rate and total dose information during radiotherapy treatment of the prostate. The system can have up to seven channels that can simultaneously provide dosimetry data at seven locations inside the body, at and near the prostate. The spatial resolution of the dose measurements is less than a millimeter. The fiberoptic-coupled system utilizes novel, optically stimulated ... |
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| Space-Guides: Efficient Thin-Film Optical Interconnects |
29 SEP 2000 |
4 pages |
| Authors:
E. Ertekin; A. Lakhtakia; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING SCIENCE AND MECHANICS
|
| Waveguiding in a thin-film helicoidal bianistropic medium (TFHBM) layer is investigated. A dielectric TFHBM layer bounded by isotropic dielectric half-spaces is shown to support guided wave propagation with guide wavenumbers dependent on the direction of signal propagation, thus signalling potential use as a spaceguide. The modal fields and power transmission distributions associated with the guided modes in the proposed TFBBM interconnects are detailed. |
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| On Mode Spectrum Degenerations, Quasi-Degenerations and Mode Polarization Transformations in Optical Chiral Waveguides |
29 SEP 2000 |
4 pages |
| Authors:
S. V. Demidov; K. V. Kushnarev; V. V. Shevchenko; AKADEMIYA NAUK SSSR MOSCOW INST RADIOTEKHNIKI I ELEKTRONIKI
|
| It is known 1-3, that mode spectrum degenerations take place for modes in chiral optical waveguides. Dispersion characteristics (curves) cross one another in the degeneration points, where propagation constants of two modes have the same values on some frequency. However, the more accurate analysis shows, that degeneration points are not exact but approximate only. In reality they are quasi-degeneration points. The dispersion curves do not cross one another, they close ... |
|
| Polarized Spatial Soliton in a Chiral Optical Fiber |
29 SEP 2000 |
4 pages |
| Authors:
H. Torres-Silva; M. Zamorano; UNIVERSIDAD DE TARAPACA CASILLA ARICA (CHILE)
|
| The problem of soliton propagation in nonlinearity Kerr medium with linear optical activity and cubic anisotropy is considered. It is shown that the balance between the nonlinearity and linear girotropic results in the existence of spatial polarized solitons with fixed states of polarization. The chirality effect is characterized through the Born-Fedorov formalism and the results show modifications of the attenuation and nonlinear coefficient compared with the topical coefficients in a ... |
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| Thermal Receiver Detectable THz Radiation from an InAs Irradiated With 1.04-Micrometers Femtosecond Fiber Laser in a 2-T Permanent Magnet |
29 SEP 2000 |
3 pages |
| Authors:
Hideyuki Ohtake; Yuji Suzuki; Nobuhiko Sarukura; Shingo Ono; Takeyo Tsukamoto; INSTITUTE FOR MOLECULAR SCIENCE OKAZAKI(JAPAN)
|
| Thermal receiver detectable THz radiation is generated from an InAs irradiated with 1.04 micrometer, 80-fs, 180mW fiber laser in a 2-T field by a compact permanent magnet. The THz radiation is monitored by a pyroelectric thermal receiver that is Deuterated Triglycine Sulfate (DTGS). DTGS operates at room temperature and it neither require time-gating adjustment nor cryogen cooling operation using liquid helium. The size of THz-radiation emitter system becomes almost the ... |
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| Optoelectronics Research Center |
22 SEP 2000 |
481 pages |
| Authors:
S. R. Brueck; NEW MEXICO UNIV ALBUQUERQUE CENTER FORHIGH TECHNOLOGY MATERIALS
|
| The AFOSR Optoelectronics Research Center maintains a broadly based program at the forefront of optoelectronics with efforts in linear and nonlinear materials, device processing, device design, and in device integration. Examples of materials and structures are quantum dots, superlattices, digital alloys, and strained-layer semiconductors, and new nonlinear materials. Processing developments relate to smaller dimensions and improved techniques for the selective deposition, modification and removal of materials. Improved ... |
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| Where Science and Technology Meet: OCEANS 2000 MTS/IEEE Conference Held in Providence, Rhode Island, 11-14 September 2000 (CD-ROM) |
11 SEP 2000 |
|
| Authors:
LASERS AND ELECTRO-OPTICS SOCIETY (IEEE) PISCATAWAY NJ
|
| ELECTRONIC FILE CHARACTERISTICS: 378 files; Adobe Acrobat PDF documents linked from "Start.pdf." PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 324 MB. SYSTEMS DETAIL NOTE: Requires Adobe Acrobat Reader 4.0 (on CD-ROM); full-text search option available. ABSTRACT: The Oceans 2000 MTS/IEEE conference encompassed more than 350 technical presentations in 113 sessions. The papers presented are recorded on a single searchable CD. Topics cover a variety of subjects ... |
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| Embedded Fiber Optic Sensors for Integral Armor |
SEP 2000 |
111 pages |
| Authors:
Bruce K. Fink; Kelli Corona-Bittick; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| This report describes the work performed with Production Products Manufacturing & Sales (PPMS), Inc., under the "Liquid Molded Composite Armor Smart Structures Using Embedded Sensors" Small Business Innovative Research (SBlR) Program sponsored by the U.S. Army Research Laboratory (ARL). In the Phase I effort, fiber optic sensor systems were investigated for in-process cure monitoring and in-service health and dynamic response monitoring of monocoque and hybrid ... |
|
| Analysis and Design of a Universal Traffic Network |
SEP 2000 |
134 pages |
| Authors:
John B. Hunter; Holger Grossmann; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| As the field of computer networking has evolved, so too has the use of these networks. Modern networks must be capable of performing more than simple data transfer. To be of value, a network must be able to handle the convergence of different types of traffic: voice, video, and data; and the Quality of Service requirements associated with each type. This thesis performs a detailed ... |
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| Reliable, Intense, Ultrafast and Compact Guided-Wave Laser for Cloud Penetration, Remote Sensing, and Active Imaging |
SEP 2000 |
46 pages |
| Authors:
Philippe Bado; CLARK-MXR INC DEXTER MI
|
| The goal of this program is to develop reliable, ultrafast, high peak-power lasers. These lasers will be used in the military for cloud penetration, reconnaissance, remote sensing, and active illumination; in the microelectronic industry for repair of photomasks and for memory yield improvement; in the automotive industry for sensors and fuel injector machining; and in the aerospace industry for turbine blade machining. We met all of our Phase I objectives. ... |
|
| Nonlinear Liquid Crystalline Fiber Structures |
31 AUG 2000 |
11 pages |
| Authors:
Iam C. Khoo; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ELECTRICAL ENGINEERING
|
| This research program is centered on exploring and studying the fundamental mechanisms underlying novel nonlinear optical properties of liquid crystals in their isotropic as well as liquid crystalline phases. Experimental and theoretical studies involving nonlinear optical wave mixing, short pulse propagation in nonlinear fiber core, and polarization selective holography were conducted. The technical achievements obtained may be summarized in the following two broad categories. ... |
|
| Superconducting Hot Electron Mixers for Fiber Optics |
31 AUG 2000 |
7 pages |
| Authors:
Roman Sobolewski; ROCHESTER UNIV NY LAB FOR LASER ENERGETICS
|
| The main objective of this grant was research and development of superconducting NbN hot-electron photodevices for the optical-to-electrical signal conversion with a speed of 30 Gb/s. The program was realized as a direct collaboration between the Moscow State Pedagogical University (MSPU) and the University of Rochester (UR). As the demonstration project, we developed an integrated superconducting fiber-optic signal-processing unit, consisting a hot- electron NbN device and a broadband amplifying circuitry, ... |
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Fiber Optics and Integrated Optics
