High-accuracy finite-difference beam-propagation method for cylindrical geometry |
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| Authors: | W-P Zang J-G Tian Z-B Liu W-Y Zhou F Song C-P Zhang |
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| Institution: | (1) The MOE Key Lab of Advanced Technique & Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials & Technology for Information Science, Nankai University, Tianjin, 300457, P.R. China |
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| Abstract: | A high-accuracy finite-difference beam-propagation method (HAFD-BPM) based on high-accuracy divided-difference formulas is
presented. The truncation error in this HAFD-BPM is reduced to o(Δr)4in the transverse direction, whereas the error in a conventional FD-BPM is typically o(Δr)2. Gaussian beam propagation in vacuum and nonlinear medium is simulated by this new method and conventional one. The comparison
between them in computing time and accuracy reveals the advantage of this new method. As an example, this method is applied
to the simulation of blow-up in self-focusing of a Gaussian beam.
PACS 42.65.Hw; 42.25.Bs; 02.70.Bf |
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