Tapered optical couplers with grating: Beyond the weak-guidance limit
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Published:1993-01-01
Issue:1-2
Volume:71
Page:5-10
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ISSN:0008-4204
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Container-title:Canadian Journal of Physics
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language:en
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Short-container-title:Can. J. Phys.
Author:
Florjaāczyk M.,Tremblay R.
Abstract
We describe the operation of a grating-assisted optical coupler consiting of two different curved slab wave guides. A version of vectorial, nonorthogonal coupled-mode theory based on local modes is applied. The coupled-mode equations contain mode overlap terms and coupling terms, which vary with distance. These equations are solved numerically for even-transverse magnetic modes propagating in the non-weakly guided slabs. We show output light powers as a function of the input wavelength assuming a condition of contradirectional coupling. For comparison we also show the result in the limit of weak guidance and a result from the vectorial theory without mode overlaps.
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy