JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2014, Vol. 44 ›› Issue (1): 19-23.doi: 10.6040/j.issn.1672-3961.0.2013.223

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TE mode analysis based on a new Padé approximant BPM algrorithm

LIU Yang, GE Lian-sheng*   

  1. Network and Information Center, Shandong University, Jinan 250100, China
  • Online:2014-02-20

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Abstract:

The most common method used in the wideangle BPM(beam propagation method)was the (p, p) Padé approximant formalism, which could not damp the evanescent modes for the algorithm itself. A new BPM based on a direct approximation to the propagator using (p-1, p) Padé approximant was applied to tapered waveguide for TE polarized waves. Based on the results of the new method, it was found that the new method of (p-1, p)  Padé approximant could obviously suppress the evanescent modes in TE mode, and could be more accurate to the propagating modes with the increase of p.

Key words: wedge waveguide, BPM, approximant, numerical simulation, Padé, TE mode, evanescent mode

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