Laser Beam Propagation In Non Kolmorogov Atmospheric Turbulence

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Laser Beam Propagation in Non-Kolmogorov Atmospheric Turbulence

Author :
Publisher :
ISBN 13 :
Total Pages : 91 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Laser Beam Propagation in Non-Kolmogorov Atmospheric Turbulence by :

Download or read book Laser Beam Propagation in Non-Kolmogorov Atmospheric Turbulence written by and published by . This book was released on 1994 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several observations of atmospheric turbulence statistics have been reported which do not obey Kolmogorov's power spectral density model. These observations have prompted the study of optical propagation through turbulence described by non-classical power spectra. This thesis presents an analysis of optical propagation through turbulence which causes index of refraction fluctuations to have spatial power spectra that obey arbitrary power laws. The spherical and plane wave structure functions are derived using Mellin transform techniques and are applied to the field mutual coherence function (MCF) using the extended Huygens-Fresnel principle. The MCF is used to compute the Strehl ratio of a focused, constant amplitude beam propagating in non-Kolmogorov turbulence as the power law for the spectrum of the index of refraction fluctuations is varied from -3 to -4. The relative contributions of the log amplitude and phase structure functions to the wave structure function are computed. If inner and outer scale effects are neglected, no turbulence exists when the power law equals -3. At power laws close to -3, the magnitude of the log amplitude and phase perturbations are determined by the system Fresnel ratio. At power laws approaching -4, phase effects dominate in the form of random tilts.

Laser Beam Propagation in the Atmosphere

Author : Hugo Weichel
Publisher : SPIE Press
ISBN 13 : 9780819404879
Total Pages : 114 pages
Book Rating : 4.4/5 (48 download)

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Book Synopsis Laser Beam Propagation in the Atmosphere by : Hugo Weichel

Download or read book Laser Beam Propagation in the Atmosphere written by Hugo Weichel and published by SPIE Press. This book was released on 1990 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Laser Beam Propagation in Non-Kolmorogov Atmospheric Turbulence

Author : Bruce Edward Stribling (CAPT, USAF.)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (132 download)

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Book Synopsis Laser Beam Propagation in Non-Kolmorogov Atmospheric Turbulence by : Bruce Edward Stribling (CAPT, USAF.)

Download or read book Laser Beam Propagation in Non-Kolmorogov Atmospheric Turbulence written by Bruce Edward Stribling (CAPT, USAF.) and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electromagnetic Wave Propagation in Turbulence

Author : Richard J. Sasiela
Publisher : Springer Science & Business Media
ISBN 13 : 3642850707
Total Pages : 309 pages
Book Rating : 4.6/5 (428 download)

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Book Synopsis Electromagnetic Wave Propagation in Turbulence by : Richard J. Sasiela

Download or read book Electromagnetic Wave Propagation in Turbulence written by Richard J. Sasiela and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Wave Propagation in Turbulence is devoted to a method for obtaining analytical solutions to problems of electromagnetic wave propagation in turbulence. In a systematic way the monograph presents the Mellin transforms to evaluate analytically integrals that are not in integral tables. Ample examples of application are outlined and solutions for many problems in turbulence theory are given. The method itself relates to asymptotic results that are applicable to a broad class of problems for which many asymptotic methods had to be employed previously.

Laser Beam Propagation in the Atmosphere

Author : J. W. Strohbehn
Publisher :
ISBN 13 :
Total Pages : 426 pages
Book Rating : 4.:/5 (41 download)

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Book Synopsis Laser Beam Propagation in the Atmosphere by : J. W. Strohbehn

Download or read book Laser Beam Propagation in the Atmosphere written by J. W. Strohbehn and published by . This book was released on 1978 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Laser Beam Propagation Through Random Media

Author : Larry C. Andrews
Publisher : SPIE-International Society for Optical Engineering
ISBN 13 :
Total Pages : 506 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Laser Beam Propagation Through Random Media by : Larry C. Andrews

Download or read book Laser Beam Propagation Through Random Media written by Larry C. Andrews and published by SPIE-International Society for Optical Engineering. This book was released on 1998 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very Good,No Highlights or Markup,all pages are intact.

Experimental Investigations of Optical Propagation in Atmospheric Turbulence

Author : Michael W. Fitzmaurice
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Experimental Investigations of Optical Propagation in Atmospheric Turbulence by : Michael W. Fitzmaurice

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.

Analysis of Atmospheric Turbulence Effects on Laser Beam Propagation Using Multi-wavelength Laser Beacons

Author : Joseph Lee Reierson
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (86 download)

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Book Synopsis Analysis of Atmospheric Turbulence Effects on Laser Beam Propagation Using Multi-wavelength Laser Beacons by : Joseph Lee Reierson

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:

Mutual Coherence Function and Frequency Spectrum of a Laser Beam Propagating Through Atmospheric Turbulence

Author : Ronald Louis Fante
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Mutual Coherence Function and Frequency Spectrum of a Laser Beam Propagating Through Atmospheric Turbulence by : Ronald Louis Fante

Download or read book Mutual Coherence Function and Frequency Spectrum of a Laser Beam Propagating Through Atmospheric Turbulence written by Ronald Louis Fante and published by . This book was released on 1974 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mutual coherence function of a laser beam propagating in turbulence with a modified von Karman spectrum for the index of refraction fluctuations, including a parametric study of the effect on the MCF of varying beam size, focal length, and the properties of the turbulence was computed. The results are valid over all propagation distances, unlike calculations employing the method of smooth perturbations. Also studied was the effect of a constant wind on the frequency spectrum of signal. It was found that over most practical path lengths the spectral width is delta omega = 4.1V ((k sub o)sup 6/5)(z sup 3/5)((C sub n, sub 2)sup 3/5), where V is the wind speed, k sub o is the signal wavenumber, C sub n sup 2 is the strength of turbulence, and z is the path length in the turbulence. (Modified author abstract).

Effect of Atmospheric Turbulence On Laser Beam Propagation

Author :
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Effect of Atmospheric Turbulence On Laser Beam Propagation by :

Download or read book Effect of Atmospheric Turbulence On Laser Beam Propagation written by and published by . This book was released on 1996 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the effect of atmospheric turbulence on laser beam propagation between tops of the high building and the hill behind our university campus at the distance of 1500m is discussed. The typical range of measurable C(n) values, curvature of the laser beam propagation and the focal spots diameter of the laser beam are given, which are agreement with the theory analysis.

Optical Beam Propagation in Turbulent Media

Author : Ronald Louis Fante
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Optical Beam Propagation in Turbulent Media by : Ronald Louis Fante

Download or read book Optical Beam Propagation in Turbulent Media written by Ronald Louis Fante and published by . This book was released on 1975 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most recent developments on the propagation of microwave and optical beams in turbulent media, such as the clear atmosphere are discussed. Among the phenomena considered are beam spreading, beam wander, loss of coherence, scintillations, angle-of-arrival variations, and short pulse effects. Also included is a discussion of methods of compensation of the effect of turbulence on communications and imaging systems.

Adaptive Beaming and Imaging in the Turbulent Atmosphere

Author : Vladimir Petrovich Lukin
Publisher : SPIE Press
ISBN 13 : 9780819443373
Total Pages : 222 pages
Book Rating : 4.4/5 (433 download)

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Book Synopsis Adaptive Beaming and Imaging in the Turbulent Atmosphere by : Vladimir Petrovich Lukin

Download or read book Adaptive Beaming and Imaging in the Turbulent Atmosphere written by Vladimir Petrovich Lukin and published by SPIE Press. This book was released on 2002 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the wide application of adaptive optical systems, an understanding of optical wave propagation in randomly inhomogeneous media has become essential, and several numerical models of individual AOS components and of efficient correction algorithms have been developed. This monograph contains detailed descriptions of the mathematical experiments that were designed and carried out during more than a decade's worth of research.

A Simple Code for Calculating Atmospheric Turbulence Effects on Laser Beam Propagation

Author : Ehud Azoulay
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (258 download)

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Book Synopsis A Simple Code for Calculating Atmospheric Turbulence Effects on Laser Beam Propagation by : Ehud Azoulay

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:

Design and Analysis of a System for the Study of Atmospheric Turbulence Effects on Laser Beam Propagation

Author : Dennis Harry Quine (CAPT, USAF.)
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (132 download)

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Book Synopsis Design and Analysis of a System for the Study of Atmospheric Turbulence Effects on Laser Beam Propagation by : Dennis Harry Quine (CAPT, USAF.)

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:

Numerical/Optical Simulation of Laser Beam Propagation Through Atmospheric Turbulence

Author :
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Numerical/Optical Simulation of Laser Beam Propagation Through Atmospheric Turbulence by :

Download or read book Numerical/Optical Simulation of Laser Beam Propagation Through Atmospheric Turbulence written by and published by . This book was released on 1995 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, computer simulation and optical modeling of laser beam propagation through the turbulent atmosphere, as well as development of techniques using photorefractive crystals to mitigate phase distortions in laser beams, have been done. In the framework of the first direction the mathematical methods and computational schemes based on split step operators, phase screen model and the Monte Carlo method have been elaborated. Spatial statistics of light field in laser beam has been studied in relation to inner and outer scales for different models of atmospheric turbulence. Regimes of weak, moderate and strong fluctuations have been considered. In the framework of the second direction the possibility of simulation of double pass and anisoplanatic effects by means of few phase screens has been studied. An experimental set up for optical modeling anisoplanatic effects by the use of dynamic phase modulator has been designed. A method of generation of random optical field with variable correlation function has been proposed and tested. In the framework of the third direction the problem of mitigation of distorted optical signals in photorefractive crystals has been studied. An optimal effective operating range of one way system, based on nonlinear interaction of distorted signal with pumping formed by spatial filtering of the signal, has been found. Using the criterion of maximal mitigation of phase and amplitude distortions, the schemes of two and four beam interaction in InP:Fe have been optimized.

Laser Beam Propagation in the Atmosphere

Author : J. W. Strohbehn
Publisher : Springer
ISBN 13 : 9783662311615
Total Pages : 328 pages
Book Rating : 4.3/5 (116 download)

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Book Synopsis Laser Beam Propagation in the Atmosphere by : J. W. Strohbehn

Download or read book Laser Beam Propagation in the Atmosphere written by J. W. Strohbehn and published by Springer. This book was released on 2014-03-12 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts

Experiments for Laser Beam Propagation Through Optical Turbulence

Author : Angel Fernandez
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (113 download)

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Book Synopsis Experiments for Laser Beam Propagation Through Optical Turbulence by : Angel Fernandez

Download or read book Experiments for Laser Beam Propagation Through Optical Turbulence written by Angel Fernandez and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric turbulence, generated by a differential temperature between the Earth's surface and the atmosphere, causes effects on optical waves that have been of great interest to scientists for many years. Wave front distortions in the optical wave induced by atmospheric turbulence result in a spreading of the beam beyond that due to pure diffraction, random variations of the position of the beam centroid, and a random redistribution of the beam energy within a cross section of the beam leading to irradiance fluctuations. Those effects have far-reaching consequences on astronomical imaging, free space optics (FSO) communications, remote sensing, laser satellite communication, astronomical imaging, adaptive optics, target designation, hyperspectral LiDAR, and other applications that require the transmission of optical waves through the atmosphere. Throughout this thesis, we introduce a globally concept of turbulence, focusing in atmospheric turbulence.Diverse experiments have been carried out, for instance, the propagation of two parallel thin beams under geometrical optics condition for studying the parameters of optical turbulence, and besides, the same optical configuration was used to investigate the best sampling rate for optical turbulence. Furthermore, we have measured evapotranspiration by remote sensing, in which we have heeded the fluctuations of the refractive index through the intensities of the turbulence. Finally, experiments which involve a new beam are also developed, such as phase-flipped Gaussian beam. This beam shows an experimental reduction on its irradiance fluctuations induced by the turbulence, which means that it has a high performance in optical communications. The experimental reduction aforementioned is proved through the comparison with the theory developed.