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

摘要

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)