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Proceedings Paper

Dielectric optical waveguide coupling analysis using two-dimensional finite difference in time-domain and frequency-domain simulations
Author(s): Lee L. Liou; Antonio Crespo; Paul Sotirelis
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Paper Abstract

The coupling length of the dielectric optical waveguide is inversely proportional to the difference of the even- and odd-mode propagation constants. It is important to accurately determine these values, since their difference is in a fraction of 10-3. To resolve this small difference, simulation using 2-dimensional finite-difference in time-domain method requires long computation time. Moreover, the time-domain method is not efficient to determine the modal functions. Frequency-domain method is cast as an eigenvalue solver, and the modal functions can be directly solved with the corresponding propagation constant. However, this method requires an initial knowledge of the eigenvalue to efficiently determine the modes of interest. This initial knowledge can be provided from the time-domain method. In this study, we conduct analysis of an AlGaN/GaN dielectric optical waveguide coupler combining time- and frequency-domain methods. Taking advantage from both methods, the propagation constants and the modal functions were obtained with a reasonable computation time.

Paper Details

Date Published: 12 June 2002
PDF: 9 pages
Proc. SPIE 4646, Physics and Simulation of Optoelectronic Devices X, (12 June 2002); doi: 10.1117/12.470574
Show Author Affiliations
Lee L. Liou, Air Force Research Lab. (United States)
Antonio Crespo, Air Force Research Lab. (United States)
Paul Sotirelis, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 4646:
Physics and Simulation of Optoelectronic Devices X
Peter Blood; Marek Osinski; Yasuhiko Arakawa, Editor(s)

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