Download or read book Propagation of high power pulses of 10 6 micrometers radiation from a CO2 tea laser of novel design through clouds produced by adiabatic expansion in the laboratory written by P. F. Browne and published by . This book was released on 1976 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes (1) theory, design and performance of a CO2 TEA laser with VUV preionization delivering typically 25J pulses of duration 0.1 microsecond and beam cross section 20 per sq cm; (2) the production of clouds in the laboratory by adiabatic expansion of compressed gas in a 300 1 glass chamber and the measurement of the cloud parameters (liquid water content, drop radius); (3) measurements of attenuation by such clouds of TEA laser pulses of the above type and also measurement of partial cloud clearing by a CW 10.6 micrometer beam (by recording the change in attenuation of a collinear He-Ne beam); and (4) the theory required to understand the interaction between 10.6 micrometers radiation and clouds of droplets. (Author).
Download or read book Systems for Study of Propagation of CO2 Laser Radiations Through Clouds written by P. F. Browne and published by . This book was released on 1978 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the design, and progress toward the construction, of systems required for the study of the propagation of 10.6 micrometers radiation from CO2 lasers (both high power pulsed and cw) through clouds, both laboratory generated and natural. The laboratory experiments of highest priority are the study of non-linear attenuation of high power TEA laser pulses (of order 10 J/sq. cm.) through optically thick clouds produced by adiabatic expansion with particular attention to change of pulse shape, and measurements of backscatter. The systems required for these experiments are nearing completion. The field experiments are the study of attenuation, beam quality and backscatter of TEA laser pulses and cw radiation over a return path of the order of 1 km. The systems required are under construction. All lasers and also the transmissometer have been developed within the group. (Author).
Download or read book Energy Research Abstracts written by and published by . This book was released on 1978 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1977-02 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of Intensive Laser Radiation in Clouds written by O. A. Volkovit︠s︡kiĭ and published by AIAA. This book was released on 1992 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation This text deals with the interaction between intensive laser radiation and clouds and will be helpful in implementing specific laser systems operating in the real atmosphere. The fundamentals of nonlinear statistical optics of aerodisperse media are addressed for the first time in this volume. Scientists and engineers interested in the problems of laser radiation propagation in the atmosphere, as well as postgraduates and senior students specializing in nonlinear optics, laser physics, and quantum electronics, will find the expert research contained within these pages valuable.
Download or read book Tea CO2 Laser Systems at Stanford written by Stanford University. Microwave Laboratory and published by . This book was released on 1974 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction of a Carbon Dioxide TEA Transversely Excited Atmospheric Laser written by Douglas Harmon Barr and published by . This book was released on 1972 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent development of CO2 Transverse Excitation at Atmospheric Pressure (TEA) lasers has generated expanding interest and success due to their high pulsed power capabilities and simplicity of construction. The authors therefore decided to construct a CO2 TEA laser because of the need for a high powered, pulsed, coherent radiation source with wave length near 10 microns to conduct absorption studies of laser-induced plasmas. It was decided that the constructed laser should have an output energy per pulse between 10 to 50 joules with a pulse time between 0.1 to 1.0 microseconds. This paper deals with the construction of that laser, and includes a discussion of the background and physics of operation of the CO2 TEA laser. (Author).
Download or read book Construction of a Carbon Dioxide TEA Transversely Excited Atmospheric Laser written by and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent development of CO2 Transverse Excitation at Atmospheric Pressure (TEA) lasers has generated expanding interest and success due to their high pulsed power capabilities and simplicity of construction. The authors therefore decided to construct a CO2 TEA laser because of the need for a high powered, pulsed, coherent radiation source with wave length near 10 microns to conduct absorption studies of laser-induced plasmas. It was decided that the constructed laser should have an output energy per pulse between 10 to 50 joules with a pulse time between 0.1 to 1.0 microseconds. This paper deals with the construction of that laser, and includes a discussion of the background and physics of operation of the CO2 TEA laser. (Author).
Download or read book Research Studies on Techniques for Ultrashort Pulses at CO2 Laser Wavelengths written by Stanford University. Microwave Laboratory and published by . This book was released on 1975 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrashort Pulses at CO2 Laser Wavelengths written by Stanford University. Ginzton Laboratory and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of Intensive Laser Radiation in Clouds written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Non Linear Propagation and Chirping of CO2 Lasers written by David C. Smith and published by . This book was released on 1969 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is summarized on non-linear propagation of CO2 laser radiation (10.6 micrometer wavelength) in absorbing and amplifying media, the generation and propagation of mode locked CO2 laser radiation, and the chirping or frequency sweeping of CO2 laser pulses.
Download or read book High Power approx 10 GW Short Pulse less Than Or Equal to 1 Ns CO2 TEA Amplifier written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of a compact, two-stage CO2 TEA laser, capable of generating 10-GW subnanosecond pulses, is described. Observed pulses appear to be wider than those predicted by a coherent density-matrix kinetics model.
Download or read book Effects of Particulate Matter on Atmospheric Propagation of CO2 Laser Radiation written by and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two main nonlinear propagation problems encountered by high power CO2 laser radiation in the atmosphere are gas breakdown and thermal blooming. The influence of particulate matter on gas breakdown and also on thermal blooming was investigated. Typical atmospheric conditions contain approximately 1000 particles/cc. The presence of these particles in the air path of a high power laser beam can dramatically influence the propagation of the beam. This is illustrated by a photograph which shows particles being vaporized and ionized by a high power pulsed CO2 laser beam. The plasma balls generated not only attenuate the laser radiation, but they also act as scattering centers with completely different scattering characteristics than the original particles. The hot vapor can also act as a thermal source which could cause self-induced thermal distortion of subsequent laser pulses.
Download or read book Second Harmonic Generation of TEA CO2 10 6 Micrometer Laser Light in AgGaS2 Crystals written by and published by . This book was released on 1991 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characteristics of AgGaS2 crystal for frequency doubling of TEA CO2 10.6 micrometer laser light were investigated. When the crystal was 4. 3mm long, the maximum conversion frequency was 0.122 percent. In recent years, much progress was made in expanding the range of laser wavebands by utilizing the nonlinear effects. In the medium-infrared waveband, the CO2 laser is a relatively ideal light source and can output tens of laser spectral lines within the range 8.7 to 11.8 micrometers. With double frequency, tunable output can be obtained within the range 4.3 to 5.9 micrometers. Since the advent of CO2 lasers, researchers have conducted numerous research tasks in this area. However, since it is relatively difficult to obtain high-quality and large infrared nonlinear optical crystals, such work still remains at the laboratory research stage without practical applications.
Download or read book A UV Pre ionized Dual wavelength Short pulse High power CO 2 Laser Facility for Laser Particle Acceleration Research written by Chalk River Nuclear Laboratories. Accelerator Physics Branch and published by Chalk River, Ont. : Chalk River Laboratories, Accelerator Physics Branch. This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
