Topics: DTIC Archive, TEXTRON DEFENSE SYSTEMS EVERETT MA, *CARBON DIOXIDE LASERS, *TEA LASERS, MODE LOCKED...
The study of injection-laser mode locking was continued. The lasers were operated in the external cavity configuration using a piece of optical fiber. Pumping injection lasers with short electrical pulses at a frequency corresponding to the round-trip transit frequency of the cavity generated stable optical pulses. A modified GaAs FET structure was designed such that efficient optical coupling to the active region of the device causes a strong optical-microwave interaction in the device for...
Topics: DTIC Archive, Figueroa,L, HUGHES RESEARCH LABS MALIBU CALIF, *INJECTION LASERS, *FIELD EFFECT...
The objective of this program was to conduct exploratory development of a 1 Gbps single-pass single-unit (unmultiplexed) modulator for use with a mode-locked and frequency-doubled neodymium YAG laser in a space laser communication system. The exploratory effort was directed toward the investigation and solution of problems for Pulse Gated Binary Modulation (PGBM) modulator operation. The modulator was to operate at data rates up to 1 Gbps and be able to handle 0.53 micrometer laser power up to...
Topics: DTIC Archive, Teague, J R, MCDONNELL DOUGLAS ASTRONAUTICS CO ST LOUIS MO, *LIGHT MODULATORS, *MODE...
The feasibility of generating frequency agile impulses has been successfully demonstrated using a monolithic, photoconductive GaAs impulse device. Two time-delayed optical pulses from a mode-locked Nd:YAG laser, delivered by two different lengths of optical cables, were used to turn-on and turn-off the device. The time interval between the on-laser pulse and the off''-laser pulse was varied, resulting in a corresponding change in the output electrical pulsewidth which ranged from 2.1 ns to 4.9...
Topics: DTIC Archive, ARMY RESEARCH LAB FORT MONMOUTH NJ, *FREQUENCY AGILITY, *PHOTOCONDUCTIVITY, *PULSES,...
The available Lumonics TEA CO2 lasers (gain lengths 40 cm and 120 cm) have been mounted on an optical table and preparation of the mode-locked, line- selected output has begun. The 0.5 micro sec TEA laser pulse was considered to be too short for effective mode-locking so its pulser was modified into a simple three-element PFN to give 3 micro sec excitation. Single transverse mode operation was obtained with the 40 cm device in a folded 6m optical cavity, giving an output energy of 0.5 J in a...
Topics: DTIC Archive, TEXTRON DEFENSE SYSTEMS EVERETT MA, *CONVERSION, OSCILLATORS, OUTPUT, OPTICAL...
A tunable erbium doped fiber ring laser, pumped with a 980 nm diode laser was constructed. Output power as a function of pump power and output wavelength for a given fiber length was measured. Spectral and temporal analysis of the signal showed mode-locked pulses of short duration and broad frequency content, as well as a CW component confined to a relatively narrow optical frequency range. The mechanisms for this type of mode-locking are discussed as well as the limitations placed on the...
Topics: DTIC Archive, Teegarden, Kenneth J, KJT INC ROCHESTER NY, *OSCILLATORS, *RING LASERS, *LASER...
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 in a degenerate pump-probe experiment to investigate the...
Topics: DTIC Archive, Peyghambarian, N., ARIZONA BOARD OF REGENTS TUCSON, *OPTICAL COMMUNICATIONS, *LIGHT...
A modelocked fiber laser design was fabricated and tested at Rome Laboratory. Significant features are a fully integrated portable assembly and complete freedom from polarization sensitivity. A remarkable low threshold power of 50 mw enables use of single element laser diode pumping. Extensive optimization of the Multiple Quantum Well Saturable Absorber has resulted in stable 10 pico second pedestal free modelocked pulses in a passive self-starting configuration. Active modelocking was also...
Topics: DTIC Archive, Teegarden, Kenneth J., KJT INC ROCHESTER NY, *PULSED LASERS, *LASER APPLICATIONS,...
Theoretical and experimental investigation of generation of squeezed light using the Kerr effect in fibers. Demonstration of improved sensitivity in interferometric measurement with squeezed light. Development of a theory of quantum optical measurement based on a full quantum mechanical description of the measurement apparatus.
Topics: DTIC Archive, Haus, Hermann, MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS,...
An electro-optic device that synthesizes RF frequencies photonically by selection of two individual frequency pulses from a comb of frequencies generated by an actively mode-locked laser. The two frequencies are then combined (heterodyned) to produce the desired optical frequency source. The highly phase stable optical signal can be utilized in the photonic domain or detected for use as an electronic signal source. The prototype unit is rack mounted and computer controlled. The research...
Topics: DTIC Archive, Logan, Ronald T , Jr, UNITED TELECOMMUNICATIONS PRODUCTS INC CHALFONT PA TRANSMISSION...
This investigation examines the durability of the Quantum Dot Mode-Locked Laser (QDMLL) for use in extreme environments where ionizing radiation is a threat. These QDMLLs are fabricated using dots-in-a-well (DWELL) epitaxial structures, which utilize the unique properties of 2D and 3D quantum structures to achieve low-threshold current density in an exceptionally durable gain medium. The research at the University of New Mexico summarized in this report details the radiation hardness of the...
Topics: DTIC Archive, NEW MEXICO UNIV ALBUQUERQUE, *DWELL TIME, *PHOTONICS, *RADIATION HARDENING,...
The work for this research contract on atmospheric-pressure gas lasers had as its main objectives the generation of short laser pulses through mode locking and cavity dumping, the study of the nonlinear amplification processes in a transversely excited atmospheric pressure laser, and development of computer programs to check the observed amplifier responses against models of the relaxation processes of the CO2 molecule in a laser discharge.
Topics: DTIC Archive, Haus, Hermann A, MASSACHUSETTS INST OF TECH CAMBRIDGE, *CARBON DIOXIDE LASERS, *GAS...
Mode locking of semiconductor laser with external cavity has been observed by optoelectronic feedback. The noticeable narrowing of the microwave spectrum explains the mode locking phenomenon which occurs when the optoelectronic feedback is sufficiently strong. A second order harmonic relating method or a strip camera can be used to measure the pulse width in order to positively identify the locking condition. After testing several semiconductor lasers, the results show that most of these...
Topics: DTIC Archive, Qin, Xiaorong, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *MODE LOCKED LASERS,...
The purpose of the meeting was to provide a forum for people working in the different areas of ultrafast electronics and optoelectronics and sharing a common interest in the understanding and improvements of the electronic properties of semiconductors and superconductors, the physics of ultrafast devices, their applications and methods of measurements. (Author)
Topics: DTIC Archive, Quinn,Jarus W, OPTICAL SOCIETY OF AMERICA WASHINGTON D C, *SYMPOSIA, *ELECTROOPTICS,...
We report the generation and measurement of 804 nm pulses with durations as short as 20 fs and with peak powers as high as 500 kW from a regeneratively initiated, self-mode-locked Ti:sapphire laser. Pulse duration is shown to decrease, and spectral content to increase, as intracavity power is increased. Control of intracavity focusing and a high-modulation-depth, acousto- optic modulator allow the intracavity power to be maximized. Cavity cubic phase error is minimized by correct design and...
Topics: DTIC Archive, Barty, C P, STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS, *PEAK POWER, *SAPPHIRE,...
We have studied ultra-high speed waveguide devices for optical computing and logic operation that are compatible with the pulse-power and repetition rates available with picosecond pulses from a mode-locked semiconductor diode laser. Numerous variations of such logic operations have been implemented in our laboratories for the direct measurement of on-chip propagation delays and waveforms in Gigahertz logic circuits with unprecedented (approx. 10 ps) resolution and accuracy. We have also...
Topics: DTIC Archive, Salour, Michael M, TACAN CORP CARLSBAD CA, *LOGIC CIRCUITS, *OPTICAL CIRCUITS,...
Solid state laser systems have been demonstrated using Cr:YAG crystals. CW, regenerative modelocking and self-modelocking have been achieved with pulses as short as 120 femtoseconds being transform limited. Thin film amplifiers based on Cr:Forsterite on glass using a sol-gel deposition technique were fabricated and tested. Other techniques such as nanocrystal embedded in an index matching matrix made of polymers were explored. Cr:Forsterite, Cr:YAG, Solid state lasers, Waveguide amplifiers
Topics: DTIC Archive, Pollack, Clifford, CORNELL UNIV ITHACA NY, *YAG LASERS, *WAVEGUIDES, *CHROMIUM,...
The main objective of the proposed research has been to investigate the proper integration of large-core graded-index multimode fibers (GIMFs) in ultrafast mode-locked fiber lasers to dramatically increase the pulse energy. Detailed theoretical investigations are aimed equally at developing a fundamental understanding of pulse propagation in GIMFs, as well as providing key opportunities to enhance the performance of ultrafast mode-locked fiber lasers.
Topics: DTIC Archive, WISCONSIN UNIV-MILWAUKEE, *FIBER OPTICS, FOUR WAVE MIXING, HIGH ENERGY, MODE LOCKED...
The use of a mode-locked CO2 laser for an optically pumped near millimeter wave source has been refined and extended to the genertion of pulses form C(13)H3F at 1.22mm. More refined theoretical estimates illustrate the transient nature of the conversion process in both space and time and set approximate limits on the ultimate pulse duration to be about one-half that of the pump. The implications are that one is not limited by the intrinsic linewidth in producting short pulse and that...
Topics: DTIC Archive, DeTemple,Thomas A, ILLINOIS UNIV AT URBANA-CHAMPAIGN ELECTRO-PHYSICS LAB, *LASER...
Injection locking performance of a 1 micro set XeF laser pulse and Raman converter scaling have been investigated. Narrowband ultraviolet radiation from a frequency-doubled dye laser has been used to control the linewidth and polarization of a long pulse-length electron beam-excited XeF laser. Linewidths of 0.004 nm have been achieved in the 353 nm band of the XeF (B yields X) Laser transition. Over 90% of the energy in the free-running laser pulse has been extracted in the narrowband...
Topics: DTIC Archive, Komine, H, NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA,...
The requested equipment would fill a tremendous void in Duke's capabilities, namely the ability to generate wavelength tunable sub-picosecond pulses in the UV-visible-IR spectral region. The required tools include a regenerative amplifier (RA) and pump laser, a frequency doubled and quadrupled optical parametric amplifier (OPA), and a difference frequency mixer to allow us to cover the entire spectral region from 200 nm to 15 microns. The pre-existing mode-locked Ti: S laser is used to pump the...
Topics: DTIC Archive, Teitsworth, Stephen, DUKE UNIV DURHAM NC DEPT OF PHYSICS, *TUNABLE LASERS, LASER...
Interest in quantum dot mode-locked lasers (QD MLLs) has grown in recent years since their first demonstration in 2001 as applications for optical time domain multiplexing, arbitrary waveform generation, and optical clocking are anticipated. Ultrafast pulses below 1 ps have been reported from QD MLLs using intensity autocorrelation techniques, but so far detailed characterization examining the pulse shape, duration, chirp, and degree of coherence spiking in these lasers has not been carried...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH ELECTRO-OPTICS COMPONENTS BRANCH,...
The document contains reports on amplification of two high-intensity nanosecond TEA CO2 laser pulses, mode locking, and a closed-form analysis of electronic distribution and pumping rates.
Topics: DTIC Archive, Haus, Hermann A, MASSACHUSETTS INST OF TECH CAMBRIDGE, *CARBON DIOXIDE LASERS, *GAS...
This grant, through the DOD-University Instrumentation program, was provided to acquire a picosecond laser system for the study of non-linear optical effects as well as for structural characterization of submicron films. The laser system consists of a CW mode-locked Nd-Yag laser (Spectra-Physics, Model 300), the output of which, after frequency doubling, is split by a 50% beam splitter to sync pump two dye lasers (Spectra-Physics, Model 375). The outputs from these dye lasers are fed into two...
Topics: DTIC Archive, Prasad,Paras N, STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY, *LASER...
The objective of this program is to demonstrate the scaling potential of efficient Raman frequency conversion techniques for ultraviolet lasers. Molecular hydrogen is used as the Raman medium and an oscillator-amplifier configuration is employed to maximize conversion efficiency and beam quality. At the present time, major program milestones have been successfully met. Injection locking has been demonstrated to be an efficient technique for laser bandwidth control. Good optical beam quality has...
Topics: DTIC Archive, Komine, H, NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA,...
Terahertz radiation is an emerging field that has far reaching applications. There is a need for portable and affordable terahertz sources that may be used for detection of structural weaknesses in aerospace composites. One possibility for terahertz generation is a femtosecond Cr:LiSAF laser. However, controlling intracavity dispersion is necessary in order to get the ultrashort pulses needed to generate terahertz radiation. This research measures dispersion of the chirped femtosecond...
Topics: DTIC Archive, Goodspeed, Allison S, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...
Optical illumination of solid-state microwave devices is a promising method of controlling high-power microwave signals at high speed. Microwave generation, switching, and oscillator injection locking by optical means have been demonstrated. This program, a study of the physics of semiconductor devices under optical illumination, has the specific goals of achieving optical injection locking of oscillators, demonstrating millimeter-wave modulation of injection lasers through mode locking,...
Topics: DTIC Archive, Yen,Huan-Wun, HUGHES RESEARCH LABS MALIBU CALIF, *OPTICAL EQUIPMENT, *MICROWAVE...
Research efforts were concentrated on passive ring laser rotation sensor technology. Initial efforts were performed on supportive projects, e.g., laser stabilization, followed by a 0.62 sq m passive resonant ring laser gyro (PRRLG), leading to the development of a 60 sq m system mounted on the pneumatically supported isolation test platform (Iso-Pad) at FJSRL. Numerous sub-system tasks and a feasibility 0.62 sq m PRRLG were completed, supporting projections of very high resolution performance...
Topics: DTIC Archive, Rotge',James R, FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO, *RING...
The primary focus of this effort was to demonstrate an ultrasmall optically pumped far infrared (OPFIR) laser based on a photonic band gap (PBG) crystal cavity. Conventional cylindrical copper waveguide ultrasmall OPFIR lasers were constructed and their performance properties were measured as a function of pump power, gas pressure, and cavity length. Pure and doped two dimensional PBG crystals were constructed, and their transmissivity was measured as a function of wavelength, incidence angle,...
Topics: DTIC Archive, Everitt, Henry O., DUKE UNIV DURHAM NC DEPT OF PHYSICS, *INFRARED LASERS, *MODE...
This research project was aimed at the stabilization of the frequency and phase of a set of optical combs from a semiconductor laser operating in an active mode-locked regime. To achieve this, an intracavity Pound-Drever-Hall technique was used on a 10 GHz harmonically mode-locked semiconductor ring laser and obtained a simultaneous optical frequency comb stabilization within 3 MHz range and supermode phase noise suppression. Together with an additional phase-lock-loop, the timing jitter...
Topics: DTIC Archive, Delfyett, Peter J , Jr, UNIVERSITY OF CENTRAL FLORIDA ORLANDO, *SEMICONDUCTOR LASERS,...
Human retinal pigment epithelial (RPE) cells (hTERT-RPE1) were used to detect photo-oxidation products generated from chronic NIR (810 nm) laser exposure. Exposure of a discrete area within cell monolayers provided a means of distinguishing fluorescence above background levels. Oxidative stress was detected using the fluorescent dye H2DCF-DA and its analog CM-H2DCF-DA. Fluorescence was detected in cells exposed to mode-locked (76 MHz, -160 femtoseconds) but not CW laser exposure. Detection of...
Topics: DTIC Archive, Denton, Michael L., Eikum, Debbie M., Noojin, Gary D., Stolarski, David J., Glickman,...
Experiments were performed to determine the applicability of photoconductive semiconductor switches (PCSS) for use as output switches in subnanosecond pulse for EMP simulators. Lateral switches made of both Gallium Arsenide and Silicon with 1.5 cm long insulating regions immersed in Fluorinert were tested in a 50 ohm tri-plate transmission line geometry. Mode locked and Q-switched lasers were used to trigger both a gas switched Marx generator which pulse-charged the transmission line in 100-150...
Topics: DTIC Archive, PULSE SCIENCES INC SAN LEANDRO CA, *PHOTOCONDUCTIVITY, *SEMICONDUCTOR DEVICES,...
Topics: DTIC Archive, Komine, H, NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA, *DYE...
The objective of this program is to demonstrate the scaling potential of efficient Raman frequency conversion techniques for ultraviolet lasers. Molecular hydrogen is used as the Raman medium and an oscillator-amplifier configuration is employed to maximize conversion efficiency and beam quality. At the present time, major program milestones have been successfully met. Injection locking has been demonstrated to be an efficient technique for laser bandwidth control. Good optical beam quality has...
Topics: DTIC Archive, Komine, H, NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA,...
This Final Report covers a three year research program in basic laser physics and laser device technology. Research covered four main projects: synch-pumped OPO mode locking techniques; definitive measurements of a fundamental excess quantum noise mechanism; development of improved methods for defining and measuring transverse beam quality; and work on new unstable resonator and etched mirror concepts. We believe this program has been particularly productive. Mode locked IR pulses; mode locked...
Topics: DTIC Archive, Siegman, A. E., STANFORD UNIV CA, *INFRARED LASERS, *QUANTUM ELECTRONICS, *MODE...
An integrated diamond sapphire laser design was explored using analytical expressions, computer based simulation, and experimentation. The analytical expressions and computer based simulation predicted a solid state laser gain medium composed of diamond for removing heat and Ti:sapphire for gain could access the high average power densities required for high energy lasers satisfying requirements of the JTO program. The experimental efforts indicated that single crystal diamond could be...
Topics: DTIC Archive, Fork, Richard L, ALABAMA UNIV IN HUNTSVILLE, *DIAMONDS, *SAPPHIRE, *MODE LOCKED...
Theoretical and experimental studies of direct current modulation of semiconductor injection lasers were carried out. In the small signal approximation we found that the maximum usable frequency of modulation was limited to under 10 GHz. Experimentally we have demonstrated modulation of a single mode laser up to 3.4 GHz and was currently limited by our detection system. Optical injection locking experiments were carried out at low frequencies (2GHz). Injection locking was observed not only at...
Topics: DTIC Archive, Yen,Huan-Wun, HUGHES RESEARCH LABS MALIBU CALIF, *SEMICONDUCTOR LASERS, *FIELD EFFECT...
A new instrument for the measurement fo short fluorescence lifetimes is discussed and characterized. The instrument is basically an implementation of the cross-correlation between the excitation source and the induced fluorescence response. Such an approach, with a mode-locked argon-ion laser as the source, is shown to be capable of measuring lifetimes as short as 80ps with a precision of 10ps. The instrument is simpler and less costly than others of similar capability.
Topics: DTIC Archive, Ramsey,J M, INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY, *FLUORESCENCE,...
A theory of noise in mode-locked lasers is developed that applies to additive pulse mode-locked and Kerr lens mode-locked systems. Equations of motion are derived for pulse energy, carrier linewidth, frequency pulling, and timing jitter. The effect of gain fluctuations, mirror vibrations, and index fluctuations are determined. Measurements that can determine all four fluctuation spectra are described. Experimental data in the literature are compared with theory.
Topics: DTIC Archive, Haus, H A, MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS, *NOISE,...
Using an optical composite of Cr-doped forsterite nanocrystals embedded in a polymer host with matching refractive index, a waveguide has been built which displays optical gain up to 3dB/cm at 1.25 micrometers. This gain magnitude is significantly larger than that obtained from Er-doped glass fibers, and illustrates the potential for optical composite materials. In a similar experiment, we demonstrated optical gain from Cr:diopside at 800 nm. Diopside has never been grown in large single...
Topics: DTIC Archive, Pollock, Clifford, YALE UNIV NEW HAVEN CT, *YAG LASERS, *WAVEGUIDES, *CHROMIUM,...
The direct digitization of microwave signals of interest would allow rapid computer processing and analysis. Current analog-to-digital converters (ADCs) are bandwidth limited and electronic warfare systems must down-convert the signal before digitization causing a loss of information. Optical ADCs can directly digitize frequencies greater than 10 GHz using wideband integrated optical interferometers (folding ADCs). A critical component of the optical folding ADC is the pulsed laser used for...
Topics: DTIC Archive, Butler, James M., NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *MEASUREMENT, *CONSTRUCTION,...
Harmonically mode-locked Er-fiber soliton lasers have become a reliable source of high-repetition-rate picosecond pulses in high-speed communications and photonic analog-to-digital conversion systems because of their low-noise, dropout-free operation. We have fabricated such a laser with a strongly dispersion-managed cavity and modeled its operation, and we have found that dispersion management significantly extends the power range over which uninterrupted single-pulse production is attained...
Topics: DTIC Archive, Carruthers, Thomas F, NAVAL RESEARCH LAB WASHINGTON DC OPTICAL SCIENCES DIV, *LASERS,...
The objective of this thesis was to improve the procedure for taking ultrafast, time-resolved measurements of photoluminescence from MWIR semiconductors. Previous work has used a mode-locked titanium sapphire (Ti:Saph)laser to excite the semiconductor sample and to upconvert the photoluminescence from the semiconductor. Work completed in this thesis improved on the techniques developed during previous work.
Topics: DTIC Archive, Derbis, Richard M, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...
Specifically, we have investigated mathematically the dynamics of pulses in nonlinear optical fibers, helped design a highly-stable 60 GHz soliton source, investigated methods for controlling solitons using phase-sensitive amplifiers (PSAs), modeled the application of PSAs to optical storage loops and other optical devices, studied timing jitter in mode-locked erbium fiber lasers, and explored a new method for controlling streams of high-speed optical pulses using periodic optical phase...
Topics: DTIC Archive, Kath, William L., NORTHWESTERN UNIV EVANSTON IL DEPT OF ENGINEERING SCIENCE AND...
Optical synthetic aperture imaging concepts and techniques were theoretically and experimentally investigated. THe theory of optical synthetic aperture imaging was extended to arbitrary geometries and to multiple sources/receivers. Scanned synthetic aperture imaging was demonstrated at a wavelength of 1.22 mm. A bandwidth compression technique was analyzed and demonstrated that gave fine range resolution with only a narrow passband receiver using mode-locked lasers. A coherent optical spectrum...
Topics: DTIC Archive, Aleksoff, C C, ENVIRONMENTAL RESEARCH INST OF MICHIGANANN ARBOR INFRARED AND OPTICS...
This paper describes the process leading up to and including the mode locking of a gain switched, photolytic iodine laser of low pressures 30 Torr. First, prior to mode locking, the laser is characterized via output energy, pulse shape cavity buildup time and transverse and longitudinal mode structures. Second, the gain on the strongest transition line is measured two ways: directly with a narrowed source of tunable 1.3 mm coherent light from a solid state diode laser; and indirectly using...
Topics: DTIC Archive, Gurley, Kenneth S, AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH, *LASER PUMPING,...
This report results from a contract tasking General Physics Institute as follows: The contractor will investigate and develop an optical parametric oscillator based upon a GaSe crystal pumped by a Q-switched and mode-locked Erbium laser as detailed in the attached proposal.
Topics: DTIC Archive, Kulevsky, Lev, GENERAL PHYSICS INST MOSCOW (USSR), *NONLINEAR OPTICS, *MODE LOCKED...
The BMDO Innovative Science and Technology Experimentation Facility (BMDO/ISTEF) laser radar program is engaged in an ongoing program to develop and demonstrate advanced laser radar concepts for Ballistic Missile Defense (BMD). Research is ongoing in both direct detection and coherent detection laser radar. The direct detection research program has been collecting metric and radiometric data on targets of BMD interest both at ISTEF and at other sites for several years. The coherent detection...
Topics: DTIC Archive, Stryjewski, John, NICHOLS RESEARCH CORP SHALIMAR FL, *OPTICAL RADAR, *ANTIMISSILE...
Design and construction has began for the NBS-NRL Free Electron Laser (FEL) Facility, which will be based on the NBS-LANL continuous wave Racetrack Microtron (RTM) accelerator. The conceptual design of the facility is now complete, the RTM is nearing completion, and final negotiations with a wiggler contractor are underway.
Topics: DTIC Archive, NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD, *FREE ELECTRON LASERS, NAVAL RESEARCH...
In this project, saturable absorption and optical Kerr nonlinearity of the atomic layer graphene and CdSe quantum dot doped graphene samples were experimentally measured using the Z-scan method. In addition to measurement of third-order nonlinear optical coefficients of the atomic layer graphene and derivatives, benchmark nonlinear refractive index measurements were performed on carbon disulfide (CS2). Measurements show, in addition of the large saturable absorption, that graphene also has a...
Topics: DTIC Archive, NANYANG TECHNOLOGICAL UNIV (SINGAPORE) SCHOOL OF ELECTRONIC AND ELECTRICAL...
