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Author :
Publisher :
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4.:/5 (946 download)
Download or read book Atmospheric Effects on CO1 Laser Propagation written by and published by . This book was released on 1978 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. S. R. Murty
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (317 download)
Download or read book Atmospheric Effects on CO2 Laser Propagation written by S. S. R. Murty and published by . This book was released on 1978 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)
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.
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Download or read book The Effects of the Atmospheric Absorption of the Propagation of a CO [inferior]2 Laser Beam written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph Lee Reierson
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (86 download)
Download or read book Analysis of Atmospheric Turbulence Effects on Laser Beam Propagation Using Multi-wavelength Laser Beacons written by Joseph Lee Reierson and published by . This book was released on 2011 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. W. Tuer
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (934 download)
Download or read book Atmospheric Effects on Low Power Laser Bea Propagation written by T. W. Tuer and published by . This book was released on with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert J. Allen
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (227 download)
Download or read book Tactical Considerations of Atmospheric Effects on Laser Propagation written by Robert J. Allen and published by . This book was released on 1968 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power spectral density estimates of Mie backscatter efficiency factors computed over a range of size parameters from 0.1 to 100 in increments of 0.1 for the refractive index of 1.33 are presented. The power spectral densities are interpreted in terms of geometrical rays. It is concluded that the backscattering is dominated by surface waves which can explain much of the low- and high-frequency Fourier terms. Important implications as applied to the problem of predicting atmospheric transmission and atmospheric false targets from backscattered laser energy are presented. Modification of the SRI Mark VI Lidar for the purpose of transmitting and receiving two-wavelength (0.53 and 1.06 micrometers) energy is described. As a preliminary step, recorded lidar signatures of the output from the two independent receivers in 1.06-micrometers configuration are compared.
Author : David A. Bricker
Publisher :
ISBN 13 :
Total Pages : 47 pages
Book Rating : 4.:/5 (878 download)
Download or read book Analysis of Joint Effects of Refraction and Turbulence on Laser Beam Propagation in the Atmosphere written by David A. Bricker and published by . This book was released on 2013 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ehud Azoulay
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (258 download)
Download or read book A Simple Code for Calculating Atmospheric Turbulence Effects on Laser Beam Propagation written by Ehud Azoulay and published by . This book was released on 1989 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Beam Propagation in the atmosphere written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dennis Harry Quine (CAPT, USAF.)
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (132 download)
Download or read book Design and Analysis of a System for the Study of Atmospheric Turbulence Effects on Laser Beam Propagation written by Dennis Harry Quine (CAPT, USAF.) and published by . This book was released on 1971 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Petr Chylek
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Effect of Atmospheric Particulate Matter on the Propagation of a Laser Beam written by Petr Chylek and published by . This book was released on 1980 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Light scattering by a pair of conjugate nonspherical particles. Verification of a linear relation between IR extinction, absorption and liquid water content of fogs; Perturbation approach to light scattering by non-spherical particles; and Surface waves in light scattering by nonspherical particles.
Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (713 download)
Download or read book Characterization of Atmospheric Turbulence Effects Over 149 Km Propagation Path Using Multi-Wavelength Laser Beacons written by and published by . This book was released on 2010 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe preliminary results of a set of laser beam propagation experiments performed over a long (149 km) near-horizontal propagation path between Mauna Loa (Hawaii Island) and Haleakala (Island of Maui) mountains in February 2010. The distinctive feature of the experimental campaign referred to here as the Coherent Multi-Beam Atmospheric Transceiver (COMBAT) experiments is that the measurements of the atmospheric-turbulence induced laser beam intensity scintillations at the receiver telescope aperture were obtained simultaneously using three laser sources (laser beacons) with different wavelengths. The presented experimental results on intensity scintillation characteristics reveal complexity of the observed phenomena that cannot be fully explained based on the existing atmospheric turbulence models.
Author :
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (227 download)
Download or read book Atmospheric Effects on Airborne Lasers for Tactical Missile Defense: Clouds and Turbulence written by and published by . This book was released on 1993 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the context of Tactical Missile Defense (TMD), an Airborne (High- Energy) Laser (ABL) is investigated for its possible utility for boost-phase kill of a tactical ballistic missile, at a range of 100-1,000 km. Here we examine the effects of clouds and atmospheric turbulence, including possible compensation by Adaptive Optics (AO) techniques, which can interfere with the functioning of this concept. To avoid the effect of clouds, the aircraft carrying the laser should fly as high as possible, preferably above the tropopause. At 15 km (49 kft) there will be no problem at mid-and high latitudes, but in the tropics conventional aircraft cannot fly high enough to avoid possible interference from towering cumulonimbus, which have been found upon occasion as high as 20 km. Regarding the effects of atmospheric turbulence on beam propagation, if the airplane flies high enough that the optical viewing path avoids cloud, there would probably be no major problems with turbulence at ranges of not more than 100 km. However, for longer ranges, there may be significant effects of phase coherence, beam wander, and beam broadening that could require compensation by AO. There are critical uncertainties in models of atmospheric turbulence, suggesting that more data are needed. Work at USAF/ Phillips Laboratory and at MIT/Lincoln Laboratory is attacking the problems of appropriate compensation for atmospheric turbulence by AO techniques, but the current level of effort is not adequate to support deployment of an ABL system for TMD on a near-term basis.
Author : Everett D. Hinkley
Publisher : Springer
ISBN 13 :
Total Pages : 408 pages
Book Rating : 4.:/5 (51 download)
Download or read book Laser Monitoring of the Atmosphere written by Everett D. Hinkley and published by Springer. This book was released on 1976 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles A. Brau
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (227 download)
Download or read book Laser Atmospheric Propagation Kinetics written by Charles A. Brau and published by . This book was released on 1974 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The absorption of high power laser radiation by the atmosphere is important because the resultant heating of the air causes 'thermal lensing' and nonlinear distortion of the beam. The effects of kinetics manifest themselves in the form of transient, unsteady heating at the beginning of the laser pulse, and bleaching at high intensities. The vibrational and rotational kinetics of the absorption of DF and CO laser radiation have been studied and are described.
Author : P. F. Browne
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (227 download)
Download or read book Propagation of High Energy Pulses of 10.6 Micrometer Radiation Through the Atmosphere written by P. F. Browne and published by . This book was released on 1973 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report contains a detailed theoretical discussion of the effect of CO2 laser (10.6 micrometer wavelength) energy on fog droplets, and the subsequent effects on the optical propagation path of the laser beam. Changes in refraction index in the beam cross section are considered. Plans for construction of a fog generation chamber for water fogs of controlled characteristics suitable for CO2 laser experimentation are given. Work on the development of CO2 TEA2 laser and triggering systems and progress on a 50 W CW diffusion cooled CO2 laser is discussed. Planned experiments, using the laser under development, for study of the interaction of such beams with laboratory controlled fogs are described. (Author).
