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A nonreciprocal TE-TM mode converter with a semiconductor guiding layer was studied. The mode converter comprised a magnetic garnet/GaInAsP/InP (AlInAs-oxide, air) waveguide. When the lower cladding layer was air, the propagation distance required for a 45° mode conversion was estimated to be several hundreds of microns at 1.55 µm.
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Yokoi et al. (2002) studied this question.
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