title: Analysis of power transfer in nonsymmetric directional couplers.
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 multibranch 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.
authors.forename: Y
authors.initials: Y
authors.lastname: Shama
authors.forename: E
authors.initials: E
authors.lastname: Marom
authors.forename: A
authors.initials: A
authors.lastname: Hardy