Numerical Optical Simulation Of Laser Beam Propagation Through Atmospheric Turbulence

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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.

Numerical Simulation of Optical Wave Propagation with Examples in MATLAB

Author : Jason Daniel Schmidt
Publisher : Society of Photo Optical
ISBN 13 : 9780819483263
Total Pages : 196 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Numerical Simulation of Optical Wave Propagation with Examples in MATLAB by : Jason Daniel Schmidt

Download or read book Numerical Simulation of Optical Wave Propagation with Examples in MATLAB written by Jason Daniel Schmidt and published by Society of Photo Optical. This book was released on 2010 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical Simulation of Optical Wave Propagation is solely dedicated to wave-optics simulations. The book discusses digital Fourier transforms (FT), FT-based operations, multiple methods of wave-optics simulations, sampling requirements, and simulations in atmospheric turbulence.

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 Through Random Media

Author : Larry C. Andrews
Publisher : SPIE-International Society for Optical Engineering
ISBN 13 :
Total Pages : 820 pages
Book Rating : 4.3/5 (91 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 2005 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since publication of the first edition of this text in 1998, there have been several new, important developments in the theory of beam wave propagation through a random medium, which have been incorporated into this second edition. Also new to this edition are models for the scintillation index under moderate-to-strong irradiance fluctuations; models for aperture averaging based on ABCD ray matrices; beam wander and its effects on scintillation; theory of partial coherence of the source; models of rough targets for ladar applications; phase fluctuations; analysis of other beam shapes; plus expanded analysis of free-space optical communication systems and imaging systems.

Optical Beam Propagation in Oceanic Turbulence

Author : Nathan Farwell
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Optical Beam Propagation in Oceanic Turbulence by : Nathan Farwell

Download or read book Optical Beam Propagation in Oceanic Turbulence written by Nathan Farwell and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical beam propagation through oceanic waters is explored using a recently proposed model for the refractive index fluctuations in oceanic turbulence. The model provides an accurate depiction of the ocean through the inclusion of both temperature and salinity fluctuations to the index of refraction. Beam characteristics of fundamental importance to communication links, remote sensing, and laser radar links are explored including intensity, degree of coherence, and scintillation. Theoretical values of these parameters are found through the use of classical Rytov theory and compared to those found using a numerical optics random phase screen simulation. The impact of the oceanic turbulence is compared with that found in atmospheric turbulence as well as other random media such as biological tissue. The results presented serve as a foundation for the study of optical beam propagation in oceanic turbulence comparable to the widely studied area of propagation through atmospheric turbulence.

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:

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.

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.

Optical Waves and Laser Beams in the Irregular Atmosphere

Author : Nathan Blaunstein
Publisher : CRC Press
ISBN 13 : 1351402684
Total Pages : 334 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Optical Waves and Laser Beams in the Irregular Atmosphere by : Nathan Blaunstein

Download or read book Optical Waves and Laser Beams in the Irregular Atmosphere written by Nathan Blaunstein and published by CRC Press. This book was released on 2017-09-22 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces optical wave propagation in the irregular turbulent atmosphere and the relations to laser beam and LIDAR applications for both optical communication and imaging. It examines atmosphere fundamentals, structure, and content. It explains specific situations occurring in the irregular atmosphere and for specific natural phenomena that affect optical ray and laser beam propagation. It emphasizes how to use LIDAR to investigate atmospheric phenomena and predict primary parameters of the irregular turbulent atmosphere and suggests what kinds of optical devices to operate in different atmospheric situations to minimize the deleterious effects of natural atmospheric phenomena.

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.

Orbital Angular Momentum States of Light

Author : Kedar Khare
Publisher :
ISBN 13 : 9780750322805
Total Pages : 0 pages
Book Rating : 4.3/5 (228 download)

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Book Synopsis Orbital Angular Momentum States of Light by : Kedar Khare

Download or read book Orbital Angular Momentum States of Light written by Kedar Khare and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orbital Angular Momentum States of Light provides an in-depth introduction to modelling of long-range propagation of orbital angular momentum (OAM) modes as well as more general structured light beams through atmospheric turbulence. Starting with angular spectrum method for diffraction and description of structured light states, the book discusses the technical details related to wave propagation through atmospheric turbulence. The review of historical as well as more recent ideas in this topical area, along with computer simulation codes, makes this book a useful reference to researchers and optical engineers interested in developing and testing of free-space applications of OAM states of light. Part of IOP Series in Advances in Optics, Photonics and Optoelectronics.

Laser Beam Scintillation with Applications

Author : Larry C. Andrews
Publisher : SPIE Press
ISBN 13 : 9780819441034
Total Pages : 408 pages
Book Rating : 4.4/5 (41 download)

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Book Synopsis Laser Beam Scintillation with Applications by : Larry C. Andrews

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.

Thermal Spot Tracking, Folding FFT Modification For Laser Propagation In Turbulent Atmosphere, and Beam Transformation Optics. Selected Articles

Download Thermal Spot Tracking, Folding FFT Modification For Laser Propagation In Turbulent Atmosphere, and Beam Transformation Optics. Selected Articles PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Thermal Spot Tracking, Folding FFT Modification For Laser Propagation In Turbulent Atmosphere, and Beam Transformation Optics. Selected Articles by :

Download or read book Thermal Spot Tracking, Folding FFT Modification For Laser Propagation In Turbulent Atmosphere, and Beam Transformation Optics. Selected Articles written by and published by . This book was released on 1996 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The traditional method of numerical simulations for laser beam propagation in the turbulent atmosphere is modified. A folding FFT treatment is put forward. High spatial frequency terms of the turbulent spectrum are sampled and low spatial frequency terms are revised using this treatment. Numerical simulation results show that the calculation speed and accuracy are both enhanced and the required computer memory is reduced. Also the numerical results reflect the real properties of strong and weak effects of the atmospheric turbulence.

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.

Optical Vortex Beams

Author : Wen Cheng
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (875 download)

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Book Synopsis Optical Vortex Beams by : Wen Cheng

Download or read book Optical Vortex Beams written by Wen Cheng and published by . This book was released on 2013 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: An optical vortex (also known as a screw dislocation or phase singularity) is one type of optical singularity that has a spiral phase wave front around a singularity point where the phase is undefined. Optical vortex beams have a lot of applications in areas such as optical communications, LADAR (laser detection and ranging) system, optical tweezers, optical trapping and laser beam shaping. The concepts of optical vortex beams and methods of generation are briefly discussed. The properties of optical vortex beams propagating through atmospheric turbulence have been studied. A numerical modeling is developed and validated which has been applied to study the high order properties of optical vortex beams propagating though a turbulent atmosphere. The simulation results demonstrate the advantage that vectorial vortex beams may be more stable and maintain beam integrity better when they propagate through turbulent atmosphere. As one important application of optical vortex beams, the laser beam shaping is introduced and studied. We propose and demonstrate a method to generate a 2D flat-top beam profile using the second order full Poincare beams. Its applications in two-dimensional flat-top beam shaping with spatially variant polarization under low numerical aperture focusing have been studied both theoretically and experimentally. A novel compact flat-top beam shaper based on the proposed method has been designed, fabricated and tested. Experimental results show that high quality flat-top profile can be obtained with steep edge roll-off. The tolerance to different input beam sizes of the beam shaper is also verified in the experimental demonstration. The proposed and experimentally verified LC beam shaper has the potential to become a promising candidate for compact and low-cost flat-top beam shaping in areas such as laser processing/machining, lithography and medical treatment.

Propagation of High-energy Laser Beams Through the Earth's Atmosphere

Author : Peter B. Ulrich
Publisher : SPIE-International Society for Optical Engineering
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Propagation of High-energy Laser Beams Through the Earth's Atmosphere by : Peter B. Ulrich

Download or read book Propagation of High-energy Laser Beams Through the Earth's Atmosphere written by Peter B. Ulrich and published by SPIE-International Society for Optical Engineering. This book was released on 1990 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Laser Beam Propagation in Nonlinear Optical Media

Author : Shekhar Guha
Publisher : CRC Press
ISBN 13 : 1439866392
Total Pages : 334 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Laser Beam Propagation in Nonlinear Optical Media by : Shekhar Guha

Download or read book Laser Beam Propagation in Nonlinear Optical Media written by Shekhar Guha and published by CRC Press. This book was released on 2017-12-19 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This is very unique and promises to be an extremely useful guide to a host of workers in the field. They have given a generalized presentation likely to cover most if not all situations to be encountered in the laboratory, yet also highlight several specific examples that clearly illustrate the methods. They have provided an admirable contribution to the community. If someone makes their living by designing lasers, optical parametric oscillators or other devices employing nonlinear crystals, or designing experiments incorporating laser beam propagation through linear or nonlinear media, then this book will be a welcome addition to their bookshelf." —Richard Sutherland, Mount Vernon Nazarene University, Ohio, USA Laser Beam Propagation in Nonlinear Optical Media provides a collection of expressions, equations, formulas, and derivations used in calculating laser beam propagation through linear and nonlinear media which are useful for predicting experimental results. The authors address light propagation in anisotropic media, oscillation directions of the electric field and displacement vectors, the walk-off angles between the Poynting and propagation vectors, and effective values of the d coefficient for biaxial, uniaxial, and isotropic crystals. They delve into solutions of the coupled three wave mixing equations for various nonlinear optical processes, including quasi-phase matching and optical parametric oscillation, and discuss focusing effects and numerical techniques used for beam propagation analysis in nonlinear media, and phase retrieval technique. The book also includes examples of MATLAB and FORTRAN computer programs for numerical evaluations. An ideal resource for students taking graduate level courses in nonlinear optics, Laser Beam Propagation in Nonlinear Optical Media can also be used as a reference for practicing professionals.