Title :
An Efficient Scalar, Non-Paraxial Beam Propagation Method
Author :
Motes, R. Andrew ; Shakir, Sami A. ; Berdine, Richard W.
Author_Institution :
Space Vehicles Doctorate, Air Force Res. Lab., Albuquerque, NM, USA
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.
Keywords :
finite difference methods; light propagation; optical fibres; optical harmonic generation; refractive index; wave equations; 2D wave equation; 3D finite difference methods; 3D wave equation; azimuthal harmonics; non paraxial beam propagation; refractive index distributions; wide angle waves; Accuracy; Approximation methods; Azimuthal harmonics; Harmonic analysis; Propagation; Rectangular waveguides; Refractive index; Beam propagation in cylindrical coordinates; finite-difference non-paraxial-approximation beam propagation method (BPM); optical fiber; photonics modeling; propagation of electromagnetic waves;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2176103
