Abstract
An analysis of asymmetric directional couplers consisting of two parallel slab waveguides has been performed using the improved coupled-mode theory for multimode waveguides. The use of such couplers for multi-branch power dividers has been illustrated, and the expected performances have been discussed, both for a two-branch divider and a three-branch one. One notes in particular the high SNR and efficiency at the end of the coupling region.
© 1989 Optical Society of America
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