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A wide-angle beam propagation method using the generalized Douglas scheme for variable coefficients

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Abstract

The accuracy of the conventional finite-difference beam propagation method (FD-BPM) [1] is degraded in the analysis of wide-angle propagation because the paraxial approximation is employed. To avoid this degradation, Hadley [2] proposed the technique using Pade approximant operators for the FD-BPM based on the Crank-Nicholson (CN) scheme.

© 1995 Optical Society of America

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