Time-dependent propagation of high-energy laser beamd through the atmosphere, III

  • 38 Pages
  • 2.41 MB
  • English
Dept. of Energy, for sale by the National Technical Information Service , [Washington], Springfield, Va
StatementJ. R. Morris, J. A. Fleck, Jr
SeriesUCRL ; 52377
ContributionsFleck, J A , joint author, United States. Dept. of Energy, Lawrence Livermore Laboratory
The Physical Object
Paginationiii, 38 p. :
ID Numbers
Open LibraryOL14884976M


Department of Energy by the UCLLL under contract number WENG 5S5S22l5""r rf m '.ijiy "vWM» • w t 1, WALELY inimaxjj® 4. The computation of time-dependent three-space-dimensional laser beam propagation is described.

The methods are applicable to the propagation of high energy laser beams through the atmosphere in the presence of a horizontal wind and turbulence for most situations of interest. Possible cases are propagation of cw beams through stagnation zones, multi-pulse propagation, including Cited by:   Various factors that can effect thermal blooming in stagnation zone situations are examined, including stagnation-zone motion, longitudinal air motion in the neighborhood of the stagnation zone, and the effects of scenario noncoplanarity.

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Of these effects, only the last offers reasonable hope of reducing the strong thermal blooming that normally accompanies stagnation zones; in particular Cited by: Get this from a library.

Time-dependent propagation of high-energy laser beams through the atmosphere, IV. [J R Morris; J A Fleck; Lawrence Livermore Laboratory.]. PROPAGATION OF HIGH-ENERGY MICRON LASER BEAMS THROUGH THE ATMOSPHERE I.

INTRODUCTION The development of the gas dynamic laser has turned the prospect of a cw high-power laser into a reality. Many applications of these devices involve propagation of the beam through the atmosphere, and thus an understanding of the various aspects of beam.

Get this from a library. Propagation of high-energy laser beams through the earth's atmosphere II: proceedings, JanuaryLos Angeles, California.

[Peter B Ulrich; Leroy E Wilson; Society of Photo-optical Instrumentation Engineers.;]. 8 Atmospheric Propagation of High-Energy Laser Beams to rise almost immediately, some finite time is required for the heated air to expand and move out of the beam, creating the density.

In papers by Fleck, Morris, and Feit [2], Kandidov and Ledenev [3], and Konyaev [4], the method of spectral samples was used to generate 2D random phase screens in the problem of propagation of a coherent beam through a randomly inhomogeneous medium and, in particular, for estimating the efficiency of phase correction of atmospheric distortions.

VARIABLE ATMOSPHERE EFFECTS ON HIGH ENERGY LASER PROPAGATION R. Ruquist To cite this version: R. Ruquist. VARIABLE ATMOSPHERE EFFECTS ON HIGH ENERGY LASER PROPAGATION. Journal de Physique Colloques,41 (C9), ￿/jphyscol￿. ￿jpa￿. The partially coherent beams propagating through turbulent atmosphere have been studied in the past using coherent mode representation.

In this research, the propagation of any modes of Hermite. The propagation of high-energy laser (HEL) beams in the atmosphere is rich in fundamental physics and of paramount importance to the Navy’s directed energy research program.

Laser beams with hundreds of kilowatts to megawatts of average power are affected by numerous interrelated linear and nonlinear phenomena such as molecular and aerosol absorption and scattering. Laser beam propagation through the turbulent atmosphere with precipitation A.

Borovoy, G. Patrushev, and A. Petrov Appl. Opt. 27 (17) (). The present work deals with the studying of the laser beam propagation through the earth's atmosphere. The linear mechanism of laser atmospheric interactions is taken in our consideration. Under this assumption, the analytical model describing the atmospheric attenuation of the laser beam power during a long rang propagation is studied.

Page 93 - The classical theory of wave propagation in a turbulent medium," in Laser Beam Propagation in the Atmosphere, JW Strohbehn, ed. ‎ Appears in 26 books from Page 89 - WS Benedict, SA Clough, DE Burch, RF Calfee, K.

Fox, LS Rothman, and JS Garing, AFCRL atmospheric absorption line parameters compilation.4/5(1). Propagation of High Energy Laser Beams in Various Environments [] results of our theoretical study on the key physical processes that affect the propagation of nigh energy lasers in the atmosphere.

The main objective of this study is to discuss the optimum laser wavelength and power for efficient propagation in maritime, desert, rural. Laser Beam Propagation in the Atmosphere.

Strohbehn. Springer-Verlag, - Atmosphere - pages. 0 Reviews. From inside the book. What people are saying - Write a review. We haven't found any reviews in the usual places. Contents. Introduction Laser Beam Propagation in the Atmosphere. High Energy Laser Beam Propagation in the Atmosphere: The Integral Invariants of the Nonlinear Parabolic Equation and the Method of Moments The method of moments is used to define and derive expressions for laser beam deflection and beam radius broadening for high-energy propagation through the Earth s atmosphere.

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These expressions are augmented with the integral invariants of. Although scarcely 20 years have passed since the creation of the first laser, laser engineering has enjoyed a variety of applications in science and in practice. Among these applications, a special pI ace is held by those related to the propagation of laser radiation in the atmosphere.

Some, such.

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Recolons and F. Dios, “Accurate calculation of phase screens for the modelling of laser beam propagation through atmospheric turbulence,” Proc. SPIE51–62 (). Introduction Temporal turbulence-induced phenomena in optical propagation through the atmosphere were first studied by Tatarskii for plane waves [1].

An experimental study of horizontal laser beam propagation over paths up to km long was made in which beam diameter and shape, intensity fluctuations, and optical phase distortion were measured.

It was found that (1) received beam diameter decreases (on-axis power density increases) with increasing transmitter aperture to a limit reached at an aperture of about 11 cm, (2) beam diameter. Chapter 4. Propagation Through Haze, Fog, and Rain 40 Chapter 5. Effects of Refractive Index Variations on Beam Propagation 45 Beam Wander 51 Beam Intensity Fluctuations 54 Turbulence-Induced Beam Spreading 60 Astronomical Refraction 63 Chapter 6.

Laser Beam Propagation in an Absorbing Medium 67 6. Thermal Blooming 67   Study on focus characteristics of the laser beam for long distance propagation in atmosphere is very important for many laser applications, especially for lightcraft vehicle, laser weapon.

In this paper, the influence of atmospheric turbulence and thermal blooming on focus characteristics of laser beam is given for several typical lasers with.

Laser Beam Propagation in the Atmosphere (Topics in Applied Physics (25)) Softcover reprint of the original 1st ed. Edition by J. Strohbehn (Editor) ISBN 1 Scintillation Reduction for Laser Beams Propagating Through Turbulent Atmosphere G.P. Berman1, V.N. Gorshkov1, 2, 3, S.V. Torous2 1Theoretical Division, T-4 & CNLS MS B, Los Alamos National Laboratory, Los Alamos, New Mexico 2National Technical University of Ukraine “KPI,” 37 Peremogy Avenue, Building 7, Kiev- 56, Ukraine 3The Institute of Physics, National Academy.

launched beam, and to the “propagation efficiency” of that beam through the atmosphere. Here the term quality relates to the ability to focus the beam to a small spot at range. This document concentrates primarily on this beam quality (BQ), which is a term commonly used but poorly defined.

A simple phenomenological model for the interaction of a high-energy laser (HEL) beam with atmospheric turbulence is presented. According to this model the temperature power spectrum becomes non-Kolmogorov.

The refractive index structure constant C2n is replaced by another quantity which is space dependent and related to the local temperature gradient in the crosswind direction, and the. where Φ Laser is the laser transverse mode, δx,y and δα x,y are time-dependent deviations in beam position and angle from a defined reference propagation direction (typically a reference cavity axis), and w x,y, Θ x,y are the x- and y-beam waist sizes and divergence angles, respectively.

Beam jitter arises from a number of sources, for example from vibrations of laser cavity mirrors or. High-energy laser propagation in the atmosphere requires consideration of self-induced beam expansion due to thermal blooming and random distortion due to atmospheric turbulence.

Thermal blooming is a result of interaction between the laser radiation and the propagation path. A small portion of the laser energy is absorbed by the atmosphere. This. Gaussian laser beam propagation through ocean is investigated. Power In Special Bucket (PIB) is calculated.

Using anal ytical expressions and calculati ng seawater transmission, the effects of absorption and scattering on beam propagation are studied. Based on these formulae, propagation in ocean and atmosphere are compared. All laser systems which involve propagation of the laser beam over a path of several kilometres through the atmosphere usually experience a degradation of their performance due to a variety of natural causes, such as the gaseous and particulate constituents, fog.

Buy Laser Beam Propagation in the Atmosphere (SPIE Tutorial Text Vol. TT03) (Tutorial Texts in Optical Engineering) on FREE SHIPPING on qualified ordersReviews: 1.How do laser beams propagate? Innovative discoveries involving laser beams and their propagation properties are at the heart of Laser Beam Propagation: Generation and Propagation of Customized Light.

This book captures the essence of laser beam propagation. Divided into three parts, it explores the fundamentals of how laser beams propagate, and pro.82 Laser Beam Propagation with E+ i = E+ i (z= 0,) being the Fourier transform of the pulse E+ i (= 0,t) and the relative frequency.

= ω − the index of refraction is a relatively smooth function within the region of interest, the wave number may be expanded in a Taylor.