Abstract
We have used Monte Carlo simulation to obtain the propagation constants of the fundamental and first-order modes of a number of realistic dielectric waveguide structures. We find that Monte Carlo simulation requires a comparatively modest increase in computer time to treat a channel waveguide to the same degree of accuracy as a slab waveguide. Excellent agreement has been found in 1-D and 2-D with the fundamental mode propagation constants of the analytically soluble refractive-index profiles involving 1/cosh2. For realistic air/Ti:LiNbO3 diffused waveguides, excellent predictions are obtained for the propagation constant of the fundamental mode. The Monte Carlo simulation evaluation of the first-order mode requires more time and predictions are obtained with a fair degree of accuracy.
© 1988 Optical Society of America
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