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TBC and PML conditions for 2D and 3D BPM: a comparison

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Abstract

Any implementation of the beam propagation method, when used to analyse open problems, requires a procedure allowing radiation to leave the computational window. In this paper we present the results of a case study on the effectiveness of the classical Hadley's Transparent Boundary Conditions (TBC) and the Perfectly Matched Layer (PML) to handle strong radiation at the boundaries. A polished fibre coupler will be studied both in 2D and in 3D configurations using, in the former case, a scalar method and, in the latter, a full vectorial approach. Numerical results show that simple TBC can be used in 2D simulations also when high radiation occurs but they easily fail in 3D structures. Therefore, in these cases, the more complicated PML conditions should be preferred.

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Authors and Affiliations

  1. Dipartimento di Elettronica Informatica e Sistemistica, University of Bologna, Viale Risorgimento 2, I 40136, Bologna, Italy

    F. Fogli, G. Bellanca & P. Bassi

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  1. F. Fogli
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  2. G. Bellanca
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  3. P. Bassi
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Fogli, F., Bellanca, G. & Bassi, P. TBC and PML conditions for 2D and 3D BPM: a comparison. Optical and Quantum Electronics 30, 443–456 (1998). https://doi.org/10.1023/A:1006966230354

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  • DOI: https://doi.org/10.1023/A:1006966230354

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