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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 30,
  • Issue 1,
  • pp. 4-8
  • (2012)

An Efficient Scalar, Non-Paraxial Beam Propagation Method

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Abstract

A fast non-paraxial beam propagation method (BPM) is developed. Our method is based on expanding the field and the refractive index distributions in azimuthal harmonics, thus replacing a 3-D wave equation with a small number of 2-D wave equations. The method is shown to be substantially faster than standard 3-D finite-difference methods with comparable accuracy and works well with wide-angle waves.

© 2011 IEEE

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