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Proceedings Paper

Silicon waveguide optical nonreciprocal devices based on magneto-optical phase shift
Author(s): Tetsuya Mizumoto; Yuya Shoji; Kota Mitsuya
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Paper Abstract

The nonreciprocal phase shift caused by the first-order magneto-optical effect is effective in realizing optical nonreciprocal devices such as optical isolators and circulators in silicon waveguide platforms. The low refractive index of the buried oxide layer in a Silicon-On-Insulator (SOI) waveguide enhances the magneto-optical phase shift, which reduces the device footprints. In order to obtain the magneto-optical phase shift, it is required to integrate a magnetooptical material on the silicon waveguide. A surface activated direct bonding technique was developed to integrate a magneto-optical garnet single crystal on the silicon waveguides. Using this technique, a silicon waveguide optical isolator based on the magneto-optical phase shift was demonstrated with an optical isolation of 30 dB at a wavelength of 1548 nm. Furthermore, a four port optical circulator was demonstrated with maximum isolations of 33.5 and 29.1 dB in cross and bar ports, respectively, at a wavelength of 1543 nm. Excess insertion losses were 13 and 12.5 dB in the isolator and circulator, respectively.

Paper Details

Date Published: 8 March 2014
PDF: 12 pages
Proc. SPIE 8988, Integrated Optics: Devices, Materials, and Technologies XVIII, 89880C (8 March 2014); doi: 10.1117/12.2037250
Show Author Affiliations
Tetsuya Mizumoto, Tokyo Institute of Technology (Japan)
Yuya Shoji, Tokyo Institute of Technology (Japan)
Kota Mitsuya, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 8988:
Integrated Optics: Devices, Materials, and Technologies XVIII
Jean Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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