17
17
Jul 30, 2015
07/15
by
Bertolotti, Mario; NATO Advanced Study Institute on Physical Processes in Laser-Materials Interaction (1980 : Pianore, Italy)
texts
eye 17
favorite 0
comment 0
"Proceedings of the 1980 NATO Advanced Study Institute on Physical Processes in Laser-Materials Interaction, which was the ninth course of the Europhysics School of Quantum Electronics, held July 13-25, 1980, in Pianore, Italy"--Verso t.p
Topics: Laser materials, Laser beams
5
5.0
Nov 12, 2021
11/21
by
Morrison, Clyde A. (Clyde Arthur), 1926-
texts
eye 5
favorite 0
comment 0
xviii, 190 p. : 24 cm
Topics: Laser materials, Transition metal ions
4
4.0
Apr 25, 2022
04/22
by
Kaminskiĭ, Aleksandr Aleksandrovich
texts
eye 4
favorite 0
comment 0
xiv, 456 p. : 24 cm
Topics: Solid-state lasers, Crystals, Laser materials
10
10.0
Nov 13, 2021
11/21
by
Kan, Fu-hsi
texts
eye 10
favorite 0
comment 0
ix, 354 p. : 23 cm
Topics: Solid-state lasers -- Materials, Laser materials
173
173
Nov 30, 2012
11/12
by
Kessler, Karl G.; Passaglia, Elio; Winogradoff, Nicholas N.
texts
eye 173
favorite 1
comment 0
A brief report is presented on research in the areas of laser standards and laser materials now in progress at the National Bureau of Standards.Included are the measurement of the power and energy output of lasers, their near and far field patterns and t
Topics: Lasers--Standards--Research--United States., Laser materials--Research--United States.
This report results from a contract tasking Laser Materials and Technology Research Center of the General Physics Institute as follows: The contractor will evaluate the thermomechanical and optical properties, and conduct Raman spectroscopic studies and laser laboratory tests to determine the most promising Raman frequency shifting materials for use with 1.3 micron high power lasers.
Topics: DTIC Archive, Basiev, Tasoltan T., GENERAL PHYSICS INST MOSCOW (RUSSIA) LASER MATERIALS AND...
160
160
Feb 20, 2013
02/13
by
Franklin, Alan D., 1922-; Bennett, H. S. (Herbert S.), 1936-
texts
eye 160
favorite 0
comment 0
Topics: Heat resistant materials., Laser materials., Materials at high temperatures., Refractory materials.
324
324
Jul 11, 2010
07/10
by
Kuenzly, J. D
texts
eye 324
favorite 0
comment 0
An electrothermal thruster designed for operation with MIL-grade hydrazine is suitable for operation with propellants having lower freezing points. These propellants are 76% hydrazine - 24% hydrazine azide, Aerozine-50, 50% hydrazine - 50% monomethylydrazine, and a TRW-formulated mixture of 35% hydrazine - 50% monomethylhydrane - 15% ammonia. A steady-state specific impulse of 200 sec was exceeded by all propellants. A pulse-mode value of 175 sec specific impulse was exceeded by the azide blend...
Topics: ANEMOMETERS, ARGON LASERS, LASER MATERIALS, VELOCITY MEASUREMENT, CALIBRATING, LASER OUTPUTS, TEST...
489
489
May 22, 2011
05/11
by
Schindler, Paul; May, Russell; Claus, Richar
texts
eye 489
favorite 0
comment 0
Under this grant, fiber optic sensors were investigated for use in the nondestructive evaluation of aging aircraft. Specifically, optical fiber sensors for detection and location of impacts on a surface, and for detection of corrosion in metals were developed. The use of neural networks was investigated for determining impact location by processing the output of a network of fiberoptic strain sensors distributed on a surface. This approach employs triangulation to determine location by...
Topics: INDUSTRIES, LASER APPLICATIONS, LASER MATERIALS, MANUFACTURING, MARKETING, PROGRAMS, LASER WELDING,...
Preliminary investigation into the development of techniques to create fluoride ceramics has shown that the main principles and approaches suitable for the development of oxide ceramics could not be applied for fluorides. The hot pressing formation technique from initial single crystals was optimized to enable obtainment of stable high optical ceramics from simple fluorides and their solid solutions doped with different RE3+ ions. The spectroscopic properties of Yb3+ ions in fluoride ceramics...
Topics: DTIC Archive, GENERAL PHYSICS INST MOSCOW (RUSSIA) LASER MATERIALS AND TECHNOLOGY RESEARCH CENTER,...
Journal of Research of the National Bureau of Standards
Topics: Antimony, heat conduction, laser materials, Nd-doped glass, platinum, stress components,...
The Phase-Controlled Multi-Terawatt Femtosecond Laser (PCMTFL) is established as the major laser facility in the Townes Laser Institute at the University of Central Florida for study of high- intensity laser material interaction, laser propagation and ultrashort laser filamentation. Based on the existing laser system that was providing 35 fs pulses (25 mJ at 10 Hz and 2 mJ at 1 kHz), it consists of an important upgrade of the latter. This upgrade is being performed at the present time by the...
Topics: DTIC Archive, UNIVERSITY OF CENTRAL FLORIDA ORLANDO OFFICE OF RESEARCH, *LASER MATERIALS,...
331
331
Jun 12, 2011
06/11
by
Hull, M. S.; VanTassell, R. L.; Pennington, C. D.; Roman, M
texts
eye 331
favorite 0
comment 0
Researchers at Luna Innovations Inc. and the National Aeronautic and Space Administration s Marshall Space Flight Center (NASA MSFC) have developed an integrated fiber-optic sensor system for real-time monitoring of chemical contaminants and whole-cell bacterial pathogens in water. The system integrates interferometric and evanescent-wave optical fiber-based sensing methodologies with atomic force microscopy (AFM) and long-period grating (LPG) technology to provide versatile measurement...
Topics: CARBON FIBERS, RAYON, FULL SCALE TESTS, PERFORMANCE TESTS, LASER MATERIALS, TEST STANDS, CHARRING,...
We have investigated the growth of (Zn,Mn)(S,Se) epitaxial layers of high structural quality on (100) GaAs substrates. Double crystal x-ray diffraction (DCXRD) measurements indicate that quaternary epilayers nearly lattice-matched with GaAs are characterized by DCXRD curves with a full width at half maximum in the range 30-60 arc seconds. This indicates the successful fabrication of epitaxial layers with excellent structural integrity. Photoluminescence (PL) spectroscopy is employed to map the...
Topics: DTIC Archive, Samarth, N., PENNSYLVANIA STATE UNIV UNIVERSITY PARK, UNCLASSIFIEDMAGN, LASER...
FBIS
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *USSR, *CHEMISTRY, CATALYSIS,...
528
528
Jun 9, 2011
06/11
by
Gabb, Timothy P.; Garg, Anita; Ellis, David L
texts
eye 528
favorite 0
comment 0
Six alloys representing two classes of powder metallurgy nickel-based superalloys were examined by transmission electron microscopy (TEM) and phase extraction. Alloys KM4, CH98, IN-100 and 456 are based on a Ni-18Co-12Cr composition while alloys Rene' 88 DT and SR 3 have lower Al and Co and higher Cr contents. The lambda size distributions were determined from quantitative image analysis of the TEM images. The volume fraction of lambda and carbides and the composition of the phases were...
Topics: SOLID STATE LASERS, OSCILLATIONS, OPTICAL RESONATORS, LASER MATERIALS, RARE EARTH ELEMENTS,...
Well-characterized solid-state laser materials are evaluated for performance in optical refrigeration as well as radiation-balanced laser systems. New figures-of-merit are developed and applied to ytterbium-doped materials. Superior performance is predicted for high-cross-section tungstate materials. Photothermal deflection experiments on samples of Yb3+-doped KGd(WO4)2 confirm anti-Stokes fluorescence cooling. This is the first observation of optical cooling in a crystal.
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC PHOTONICS TECHNOLOGY BRANCH, *SOLID STATE LASERS,...
Well-characterized solid-state laser materials are evaluated for performance in radiation balanced laser systems. New figures-of-merit are developed and applied to ytterbium doped materials. Superior performance is predicted for high cross section tungstate materials. Photothermal deflection experiments on samples of Yb3+ doped KGd(WO4)2 confirm anti-Stokes fluorescence cooling. Observations of optical cooling in this high figure-of-merit material confirm the potential of this approach for...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC PHOTONICS TECHNOLOGY BRANCH, *SOLID STATE LASERS,...
A method for converting a Type 2 quantum well semiconductor material to a Type 1 material. A second layer of undoped material is placed between first and third layers of selectively doped material, which are separated from the second layer by undoped layers having small widths. Doping profiles are chosen so that a first electrical potential increment across a first layer-second layer interface is equal to a first selected value and/or a second electrical potential increment across a second...
Topics: NASA Technical Reports Server (NTRS), QUANTUM WELLS, SEMICONDUCTORS (MATERIALS), LASER MATERIALS,...
This report results from a contract tasking General Physics Institute of the Russian Academy of Sciences as follows: The spectral range of 4 - 5 microns is one of the most interesting atmospheric optical transmission windows. High peak power laser sources operating in this region are of special importance for various lidar applications. Solid state lasers with their compactness, high efficiency, and reliability in rugged conditions are quite promising for these purposes. Active laser materials...
Topics: DTIC Archive, Basiev, Tasoltan, GENERAL PHYSICS INST MOSCOW (RUSSIA) LASER MATERIALS AND TECHNOLOGY...
A composite multiple wavelength laser material is provided and is typically constructed with a common axis of construction in the form of a rod of uniform cross-section. The rod comprises a plurality of segments of laser material bonded, e.g., diffusion bonded, to one another along the common axis. Each segment lases at a unique wavelength when excited to produce a laser emission. The segments can be made from a birefringent material doped with laser active ions. If the same birefringent host...
Topics: NASA Technical Reports Server (NTRS), COMPOSITE MATERIALS, CONSTRUCTION, LASER MATERIALS, LASERS,...
A method for converting a Type 2 quantum well semiconductor material to a Type 1 material. A second layer of undoped material is placed between first and third layers of selectively doped material, which are separated from the second layer by undoped layers having small widths. Doping profiles are chosen so that a first electrical potential increment across a first layer-second layer interface is equal to a first selected value and/or a second electrical potential increment across a second...
Topics: NASA Technical Reports Server (NTRS), LASER MATERIALS, QUANTUM WELLS, SEMICONDUCTORS (MATERIALS),...
The report contains information on national-level science policies, technology strategies, and research and development programs in USSR Science and Technology specially in Chemistry Research with particular attention to electrochemistry, environmental chemistry, laser materials, petroleum processing and polymer science.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *ELECTROCHEMISTRY, *PETROLEUM...
We report what we believe to be the first preparation and optical spectroscopy of Er(3+) doped into bulk AlN ceramic. The material was prepared via hot press sintering of AlN with Er(2)O(3) and [NH(4)][ErF(4)], which yielded fully dense, translucent, hexagonal AlN. The Er(3+) concentration is a small fraction of a percent, and resides in multiple sites, with one type of center dominant. A number of the energy levels of Er(3+) are identified for this center. The temperature dependent...
Topics: DTIC Archive, ARMY RESEARCH LAB ADELPHI MD, *ALUMINUM NITRIDES, *ERBIUM, CERAMIC MATERIALS, DOPING,...
269
269
Jun 9, 2011
06/11
by
Mizoguchi, Ken-Ichi; Worthen, Denise L.; Hakkinen, Sirpa; Gregg, Watson W
texts
eye 269
favorite 0
comment 0
Results from the climatologically forced coupled ice/ocean/biogeochemical model that covers the Arctic and North Atlantic Oceans are presented and compared to the chlorophyll fields of satellite-derived ocean color measurements. Biogeochemical processes in the model are determined from the interactions among four phytoplankton functional groups (diatoms, chlorophytes, cyanobacteria and coccolithophores) and four nutrients (nitrate, ammonium, silicate and dissolved iron). The model simulates the...
Topics: LASER MATERIALS, RARE EARTH ELEMENTS, NEODYMIUM LASERS, LUTETIUM, LITHIUM FLUORIDES, POLARIZATION,...
The report contains information on national-level science policies, technology strategies, and research and development programs in USSR Science and Technology specially in Chemistry Research with particular attention to Environmental Chemistry, Laser materials, petroleum and coal processing and wood chemistry.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *CHEMICAL INDUSTRY, *LASER...
Significant progress was achieved in the epitaxy of deep UV AlN/ AlGaN Bragg mirrors and microcavity structures paving the way to the successful fabrication of vertical cavity emitting laser structures and polariton lasers. For the first time DBRs providing sufficient high reflectivity for polariton emission were demonstrated. Thanks to a developed strain balanced Al0.85Ga0.15N template, the critical thickness before cracking could be enhanced to 1.95 microns. The fabricated 25.5 pair AlN/...
Topics: DTIC Archive, Gerhold,Michael, North Carolina State University Raleigh United States, ultraviolet...
An approach to an argon ion laser based on gasdynamic techniques is presented. Improvement in efficiency and power output are achieved by eliminating high heat rejection problems and plasma confinement of the seal-off conventional lasers. The process of producing population inversion between the same energy levels, as in the conventional argon ion laser, has been divided into two phases by separating each other from the processes of ionization and subsequent excitation. Line drawings and graphs...
Topics: NASA Technical Reports Server (NTRS), ARGON LASERS, HELIUM, LASER MATERIALS, LASER OUTPUTS,...
2
2.0
texts
eye 2
favorite 0
comment 0
1 v. (various pagings) : 24 cm
Topics: Gallium nitride -- Congresses, Gallium alloys -- Congresses, Semiconductors -- Materials --...
The duration of the grant was interrupted by two major accidents that the PI met with-- an auto accident in Pasadena, CA during her second summer at JPL which took almost eight months for recovery and a second accident during Fall 2000 that left her in crutches for the entire semester. Further, the time released agreed by the University was not given in a timely fashion. The candidate has been given post-grant expire time off. In spite of all these problems, the PI synthesized a number of new...
Topics: NASA Technical Reports Server (NTRS), CRYSTALLINITY, LIQUID CRYSTALS, LASER MATERIALS, PHOTONS,...
3
3.0
May 18, 2022
05/22
by
Gurzadi︠a︡n, G. G. (Gagik Grigorʹevich), 1957-
texts
eye 3
favorite 0
comment 0
xviii, 413 p. : 24 cm
Topics: Laser materials -- Handbooks, manuals, etc, Optical materials -- Handbooks, manuals, etc, Crystals...
This report presents a discussion of laser eye-protection filtering materials. Four classes of filters are evaluated for immediate and future filtering capabilities. Salient features required for near-term multiwavelength filtering are discussed in general, and the effectiveness of several filter materials as laser protection is assessed. Spectral illuminances for the most promising eye-protection filters are computed for representative day- and night- lighting conditions to approximate visual...
Topics: DTIC Archive, Welch, Jeanne A, NAVAL RESEARCH LAB WASHINGTON DC, *LASER SAFETY, *PROTECTION, *LASER...
The report contains information on national-level science policies, technology strategies, and research and development programs in USSR Science and Technology specially in Chemistry Research with particular attention to Catalysis, chemical industry, electrochemistry, laser materials, petroleum processing and radiation chemistry.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *CATALYSIS, *CHEMICAL INDUSTRY,...
Poster presentation abstracts from the tenth International Conference on Crystal Growth (ICCG) (Aug. 16-21, 1992) are provided. Topics discussed at the conference include crystal growth mechanisms, superconductors, semiconductors, laser materials, optical materials, and biomaterials. Organizing committees, ICCG advisory board and officers, and sponsors of the conference are also included.
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, CRYSTAL GROWTH, ABSTRACTS, CRYSTALS, LASER...
Oral presentation abstracts from the tenth International Conference on Crystal Growth (ICCG) (Aug. 16-21, 1992) are provided. Topics discussed at the conference include superconductors, semiconductors, nucleation, crystal growth mechanisms, and laser materials. Organizing committees, ICCG advisory board and officers, and sponsors of the conference are also included.
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, CRYSTAL GROWTH, ABSTRACTS, CRYSTALS, LASER...
The relationship between the formalism developed previously for the macroscopic description of laser-type matter (macroscopic quantum mechanics) and several forms of semiclassical radiation theory are examined. It is shown that macroscopic quantum mechanics may be regarded as a generalization of conventional semiclassical radiation theory. The development of macroscopic quantum mechanics is carried further by extending its applicability to situations in which the atomic cooperation is less than...
Topics: DTIC Archive, Senitzky,I R, TECHNION - ISRAEL INST OF TECH HAIFA, *QUANTUM THEORY, *QUANTUM...
Partial Contents: Chemical Industry, Combustion, Explosives, Electrochemistry, Laser Materials, Polymers, Rubber.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *FOREIGN TECHNOLOGY, *CHEMICAL...
Laser host crystals of CeO2 and MgO doped with elements selected from the group Eu, Nd, Pr, Cr, Mn, Co, and V were grown to determine the properties of fluorescent spectra, lifetimes, line widths, absorption spectra, band widths of absorption bands, and absorption coefficients of the main peaks. The cubic class of crystals offers the possibility of improved lifetimes for excited ions in laser crystals. The cerium dioxide crystals of this work have the fluorite structure, and the magnesium oxide...
Topics: DTIC Archive, Mee, J E, AUTONETICS ANAHEIM CA, *CRYSTAL GROWTH, *LASER MATERIALS, CERIUM COMPOUNDS,...
Lightning Optical Corporation, under an SBIR (Small Business Innovative Research) agreement with Langley Research Center, manufactures oxide and fluoride laser gain crystals, as well as various nonlinear materials. The ultimate result of this research program is the commercial availability in the marketplace of a reliable source of high-quality, damage resistant laser material, primarily for diode-pumping applications.
Topics: NASA Technical Reports Server (NTRS), TECHNOLOGY UTILIZATION, CRYSTALS, CRYSTAL GROWTH, LASER...
The research on chelate lasers has been organized along two general lines. The first is an investigation of the properties of the materials in terms of the requirements for laser action. The second is a study of the characteristics of the chelate laser itself. The resultant information is essential for a full appreciation of the potential of chelate laser systems. A number of chelates can serve as laser materials, chemically shift the frequency of one chelate laser system by about 60 cm-1 and...
Topics: DTIC Archive, Lempicki, A, GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE NY BAYSIDE LAB,...
This report results from a contract tasking The Chancellor, Masters and Scholars of the University of Oxford as follows: The contractor will investigate the nonlinear response of porphyrin-based materials to intense laser illumination. Porphyrin-based materials have shown nonlinear coefficients an order of magnitude greater than other organic compounds. The contractor will synthesize and analyze various forms of these materials to optimize their nonlinear optics properties.
Topics: DTIC Archive, Anderson, Harry L, OXFORD UNIV (UNITED KINGDOM), *SYNTHESIS(CHEMISTRY), *OLIGOMERS,...
Stoichiometric lithium tantalate (SLT) has been identified as a promising alternative to congruent lithium niobate as substrate material for quasi-phasematched (QPM) nonlinear optical frequency conversion. The advantages of SLT include superior resistance to optical damage, greater ultraviolet transparency, and a lower coercive field which should facilitate the fabrication of thicker periodically poled chips. We report the generation of 16 W of average power at 589 nm by single-pass...
Topics: DTIC Archive, Bamford, Douglas J, PHYSICAL SCIENCES INC SAN RAMON CA, *YAG LASERS, *LASER...
The possibility of creating a plasma from fission fragments, and to utilize the energy of the particles to create population inversion that would lead to laser action is investigated. An investigation was made of various laser materials which could be used for nuclear-pumped lasing. The most likely candidate for a fissioning material in the gaseous form is uranium hexafluoride - UF6, and experiments were performed to investigate materials that would be compatible with it. One of the central...
Topics: NASA Technical Reports Server (NTRS), FISSION, PLASMA PHYSICS, LASER MATERIALS, MATHEMATICAL...
The polishing fixture designed to hold sixteen rods during fabrication was received during this quarter. Using this fixture several lots of rods were processed to evaluate the proposed polishing process. Process data, times and yields were obtained. Rods were measured for adherence to specifications and data collected as a function of rod position with the block. (Author)
Topics: DTIC Archive, Dentz,D, LITTON SYSTEMS INC MORRIS PLAINS N J AIRTRON DIV, *YAG LASERS,...
A ceramic ytterbium:yttrium aluminum garnet (Yb:YAG) thindisk laser is investigated at 15 deg C (288 K) and also at 80 K, where it behaves as a four-level laser. We introduce a new two-phase spray cooling method to cool the Yb:YAG. One system relies on R134a refrigerant while the other uses liquid nitrogen (LN2). The use of two systems allows the same disk to be tested at the two temperatures. When the Yb:YAG is cooled from room to cryogenic temperatures, the lasing threshold drops from 155 W...
Topics: DTIC Archive, Vretenar,Natasa, University of New Mexico Albuquerque United States, laser materials,...
Research is directed toward the design and synthesis of new media for solar-pumped I* lasers. Since the most effective existing lasants are perfluoroalkyl iodides, a strategy was proposed for the development of improved materials of this type with absorption maxima at 300 nm. Absorption spectra were synthesized and measured for prototypical species containing iodine bound to boron, iron, and cobalt.
Topics: NASA Technical Reports Server (NTRS), CHEMICAL BONDS, IODINE LASERS, LASER MATERIALS, SYNTHESIS...
Experimental results of a group of theoretically selected cold cathode materials are presented. These tests indicate Ag-CuO, Cu and Pt-Cu as three new cold cathode materials for sealed off CO2 lasers. The power output of a test with an Ag-CuO cathode and a gas volume of only 50 cubic centimeters varied from 0.72 W to 1.1 W at 3000 hours and yields still 0.88 W after 8000 hours. Gas discharge tubes with Cu cathodes and a volume of 25 cubic centimeters yield life times in excess of 10,000 hours....
Topics: NASA Technical Reports Server (NTRS), CARBON DIOXIDE LASERS, COLD CATHODES, LASER MATERIALS,...
One challenging goal remaining for GaAs-based InGaAsN QW lasers is to extend the emission wavelength beyond 1.3 m, while maintaining optical material quality for the realization of longer wavelength and high performance. Higher N-content leads to increased nonradiative monomolecular recombination, thus high performance at 1.55 m has not been achieved to date. Recently, we proposed a novel approach for realizing GaAs-based diode lasers with emission wavelengths beyond =1500 nm. This approach...
Topics: DTIC Archive, Mawst, Luke J, WISCONSIN UNIV-MADISON, *QUANTUM WELLS, *NITRIDES, *DIODE LASERS,...
Lasers for use in high precision satellite ranging systems consist typically of an oscillator followed by several amplifier stages. While the shortest optical pulses are achieved by using a mode locked oscillator, such an oscillator is incompatible with the compact design needed in future, highly mobile systems. The laser oscillator achieves pulse lengths approaching those obtainable by mode locking, but in a much more compact and stable design. The oscillator uses two LiNbO3 Pockels cells...
Topics: NASA Technical Reports Server (NTRS), CAVITIES, LASER OUTPUTS, OSCILLATORS, PULSED LASERS,...
This collection of papers on manufacturing technology research was presented at the Sixth Annual NSF Grantees' Conference. The first paper discusses the goals, history, scope, and activities of the Production Research and Technology Program. Several research presentations concern geometric modeling, a computer-aided injection molding system, a design for economic manufacture, optional planning of Computerized manufacturing systems, and, the design and analysis of such systems for small parts...
Topics: DTIC Archive, PURDUE UNIV LAFAYETTE IN, *SYMPOSIA, *PRODUCTION ENGINEERING, *COMPUTER AIDED...
