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Proceedings Paper

Bidirectional beam propagation modeling of photonic structures based on mode expansion and matching
Author(s): Jiri Ctyroky; Jan Plesingr
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Paper Abstract

The problem of optical wave propagation in dielectric waveguide structures with large refractive-index discontinuities and abrupt transitions that give rise to backreflections of the propagating wave is addressed. A set of `transmission-line equations' for the dominant transverse components of electric and magnetic fields in a semivectoral approximation is derived. The wave propagation is described by eigenmode expansion into both forward and backward waves in longitudinally discretized uniform sections using mode matching between the sections. Although the theory is valid for a general class of 3D structures (i.e., channel waveguides), the computer code for numerical calculations presented here was written for 2D (planar) structures only. Examples of wave propagation and reflection from waveguide discontinuities are given, and some problems evoked by the application of a reduced set of eigenmodes for the calculation are briefly discussed.

Paper Details

Date Published: 2 May 1994
PDF: 9 pages
Proc. SPIE 2150, Design, Simulation, and Fabrication of Optoelectronic Devices and Circuits, (2 May 1994); doi: 10.1117/12.174981
Show Author Affiliations
Jiri Ctyroky, Institute of Radio Engineering & Electronics (Czech Republic)
Jan Plesingr, Czech Technical Univ. (Czech Republic)

Published in SPIE Proceedings Vol. 2150:
Design, Simulation, and Fabrication of Optoelectronic Devices and Circuits
Mario Nicola Armenise, Editor(s)

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