Accession Number : AD0781877

Title :   PROP-I: An Efficient Implicit Algorithm for Calculating Nonlinear Scalar Wave Propagation in the Fresnel Approximation.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Ulrich,Peter B.

Report Date : 29 MAY 1974

Pagination or Media Count : 68

Abstract : An algorithm has been developed to advance rapidly the solution of the parabolic equation which describes the problem of propagation of intense laser beams in absorbing media. The method uses an alternating-direction implicit (ADI) technique together with either central differencing or a Galerkin method with linear spline basis to represent the transverse Laplacian in the partial differential equation. A guide to the code, a listing of the FORTRAN program, and a flow-chart are provided. (Author)

Descriptors :   *Laser beams, Propagation, Partial differential equations, Numerical integration, Computer programs, FORTRAN

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE