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Author : Roy Axford
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (667 download)
Download or read book Experimental Measurements of Laser Beam Scintillation Statistics written by Roy Axford and published by . This book was released on 1980 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. W. Fitzmaurice
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (31 download)
Download or read book Wavelength Dependence of Laser Beam Scintillation written by M. W. Fitzmaurice and published by . This book was released on 1969 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser beam scintillation and log-amplitude variance evaluation for wavelengths on digital computer.
Author : Larry C. Andrews
Publisher : SPIE Press
ISBN 13 : 9780819441034
Total Pages : 408 pages
Book Rating : 4.4/5 (41 download)
Download or read book Laser Beam Scintillation with Applications written by Larry C. Andrews and published by SPIE Press. This book was released on 2001 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewed interest in laser communication systems has sparked development of useful new analytic models. This book discusses optical scintillation and its impact on system performance in free-space optical communication and laser radar applications, with a detailed look at propagation phenomena and the role of scintillation on system behavior. Intended for practicing engineers, scientists, and students.
Author : G. R. Ochs
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.0/5 ( download)
Download or read book Measurements of 0.63mm Laser-beam Scintillation in Strong Atmospheric Turbulence written by G. R. Ochs and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Log-amplitude variance and covariance of the scintillation of a diverging optical beam have been measured over a 48-hr period at a wavelength of 0.63[mu], on a 490 and 1000 m optical paths 2 m above the surface of a flat mesa near Boulder, Colorado. Simultaneous measurements of the refractive-index structure of the atmosphere have been obtained from temperature-structure-function measurements at spacings of 1, 3, and 10 cm. A saturation of scintillation occurs for values of log-amplitude variance between 0.5 and 1. After reaching a peak, the log-amplitude variance then decreases with both increasing range and increasing refractive-index turbulence. The spatial covariance of the fluctuations tends to increase in the saturation region. In the unsaturated region, the log-amplitude variance is approximately that predicted by the spherical-wave propagation theory of Tatarski.
Author : G. R. Ochs
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (258 download)
Download or read book Measurements of 0.63 $m laser-beam scintillation in strong atmospheric turbulence written by G. R. Ochs and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wave Propagation Laboratory
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (897 download)
Download or read book MEASUREMENTS OF 0.63 Um LASER-BEAM SCINTILLATION IN STRONG ATMOSPHERIC TURBULENCE written by Wave Propagation Laboratory and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. R. Ochs
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (939 download)
Download or read book Measurements of 0.63mm Laser-beam Scintillation in Strong Atmospheric Turbulence written by G. R. Ochs and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. R. Ochs
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (89 download)
Download or read book Measurements of 0.63mm Laser-beam Scintillation in Strong Atmospheric Turbulence written by G. R. Ochs and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeffrey Robert Austen
Publisher :
ISBN 13 :
Total Pages : 388 pages
Book Rating : 4.:/5 (12 download)
Download or read book Analysis of Scintillation Data from a Laser Propagation Experiment written by Jeffrey Robert Austen and published by . This book was released on 1983 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (227 download)
Download or read book Scintillation Measurements of Broadband 980nm Laser Light in Clear Air Turbulence written by and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensity scintillation variances and intensity probability density functions (PDF) were experimentally measured for broad-band (2nm), 980 nm laser light reflected by two corner-cube retro-reflectors as a function of retro-reflector lateral spacing over a short (75 m) atmospheric optical path. The PDFs transitioned from broad double peaked beta shaped densities to log-normal ones as the retro-reflector spacing was increased to exceed the optical field lateral coherence length. Specific spacing for a given average atmospheric refractive index structure constant Cn2 eliminated coherent interference between light beams returned by each retro-reflector.
Author : G. R. Ochs
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (17 download)
Download or read book MEASUREMENTS OF 0.63 MICROMETER LASER-BEAM SCINTILLATION IN STRONG ATMOSPHERIC TURBULENCE. written by G. R. Ochs and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bradford Arthur Spear
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (227 download)
Download or read book Measurements of Direct Path and Folded Path Optical Scintillation written by Bradford Arthur Spear and published by . This book was released on 1982 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical prediction by Dr. Avihu Ze'evi of the correlation between direct path and folded path optical scintillation was developed and published at the Naval Postgraduate School in March 1982. Simultaneously, a method for measuring the scintillation of two laser beams propagating along direct and fold paths was devised and used to record preliminary findings supporting the theoretical work. This system has been improved upon to permit a complete experimental verification of the theory to be attempted outside the laboratory. The experimental results do not support Dr. Ze'evi's theory; however, changing turbulence conditions while measuring the scintillation strength may have been the cause. Further attempts at verification will have to control this factor. (Author).
Author : Michael W. Fitzmaurice
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (317 download)
Download or read book Experimental Investigations of Optical Propagation in Atmospheric Turbulence written by Michael W. Fitzmaurice and published by . This book was released on 1971 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pertinent theoretical background and the results of a group of experiments conducted over 0.4- and 1.17-km near-ground horizontal ranges are presented. (1) The log-amplitude variances for HeNe (0.633 μm) and CO2 (10.6 μm) laser beams were found to have a ratio of 26.8, which is in close agreement with the predictions of Rytov-based spherical-wave theory. (2) Published measurements of the saturation level of the log-amplitude variance are reviewed and several inconsistencies noted. (3) The spatial correlation function of irradiance field was measured and found to agree with theory. The degree of correlation between different frequency beams which had traversed the same optical path was also measured and compared to theory. The data exhibited an unacceptably large scatter and did not show the wavelength dependence. (4) The log-normal, Rayleigh, and Rice probability distributions are discussed in terms of their applicability to irradiance statistics. Relatively weak 10.6 μm irradiance fluctuations were found to be equally well described by the log-normal and Rice distributions; strong fluctuations obtained at 0.488 μm were clearly best described by the log-normal distribution.
Author :
Publisher :
ISBN 13 :
Total Pages : 1010 pages
Book Rating : 4.:/5 (318 download)
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1980 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bradford Arthur Spear
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)
Download or read book Measurements of Direct Path and Folded Path Optical Scintillation written by Bradford Arthur Spear and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical prediction by Dr. Avihu Ze'evi of the correlation between direct path and folded path optical scintillation was developed and published at the Naval Postgraduate School in March 1982. Simultaneously, a method for measuring the scintillation of two laser beams propagating along direct and fold paths was devised and used to record preliminary findings supporting the theoretical work. This system has been improved upon to permit a complete experimental verification of the theory to be attempted outside the laboratory. The experimental results do not support Dr. Ze'evi's theory; however, changing turbulence conditions while measuring the scintillation strength may have been the cause. Further attempts at verification will have to control this factor. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (227 download)
Download or read book Measurements of Intensity Scintillations and Probability Density Functions of Retroreflected Broadband 980-nm Laser Light in Atmospheric Turbulence written by and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensity scintillation variances and intensity probability density functions (PDFs) were experimentally measured for broadband (2 nm), 980-nm laser light reflected by two or more corner cube retroreflectors as a function of retroreflector lateral spacing over a short (75 m) atmospheric optical path. The PDFs transitioned from broad doublepeaked beta-shaped densities to lognormal as the retroreflector spacing was increased to exceed the optical field's lateral coherence length. Specific spacing for a given average atmospheric structural C2n eliminated interference between the light beams returned by the retroreflectors.
