Proposal of in-line wavelength-selective modulator based on waveguide interferometer

Ryotaro MORI
Tetsunosuke MIURA
Shogo URA

IEICE TRANSACTIONS on Electronics   Vol.E97-C    No.7    pp.749-754
Publication Date: 2014/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E97.C.749
Type of Manuscript: Special Section PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
integrated optics,  waveguides,  optical modulators,  distributed Bragg reflectors,  optical interconnects,  

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A new wavelength-selective optical modulator was proposed and discussed. The modulator consists of three kinds of distributed Bragg reflectors (DBRs) integrated in a single straight waveguide. The waveguide can guide TE0 and TE1 modes, and an in-line Michelson interferometer is constructed by the three DBRs. An operation-wavelength wave among incident wavelength-division-multiplexed TE1 guided waves is split into TE0 and TE1 guided waves by one of DBRs, and combined by the same DBR to be TE0 output wave with interference after one of waves is phase-modulated. A modulator using an electro-optic (EO) polymer is designed, and the static performance was predicted theoretically. An operation principle was confirmed experimentally by a prototype device utilizing a thermo-optic effect instead of the EO effect.