Self-switching in Mach-Zehnder interferometers based on SOA phase shifters

E.A. Patent, J.J.G.M. Tol, van der, J.J.M. Binsma, Y.S. Oei, E.A.J.M. Bente, M.K. Smit

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A self-switching mechanism in Mach-Zehnder Interferometers is described. The input light signal is distributed unequally over the branches where Semiconductor Optical Amplifiers are placed as non-linear phase shifters. Unequal intensities yield a non-linear phase shift. The signals from the two branches are then recombined in an output coupler. If Pi/2-phase shift is reached, the signals are in phase. This effect can be used in the low-loss optical combiner circuit. In this device the transmission can be improved by more then 2 dB with respect to a passive 3-dB splitter. Fabrication, characterization and performance of the combiners are presented in this paper.
Original languageEnglish
Title of host publicationProceedings 2004 ninth annual symposium of the IEEE/LEOS Benelux Chapter : December 2-3, 2004, Ghent, Belgium
Place of PublicationGent
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Print)90-76546-06-1
Publication statusPublished - 2004


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