期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 48, 期 2, 页码 252-260出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2011.2168194
关键词
Integrated optics; magneto-optics; wafer direct bonding; waveguide optical isolator
资金
- Japan Society for the Promotion of Science
- New Energy and Industrial Technology Development Organization
- Grants-in-Aid for Scientific Research [22246009] Funding Source: KAKEN
Waveguide optical isolators are investigated for an application to integrated optics. A nonreciprocal loss shift isolator has the advantage of high compatibility with optical active devices. The interferometric waveguide optical isolator that uses nonreciprocal phase shift brought about by the first-order magneto-optic effect is applicable to a variety of waveguide platforms. In a silicon-on-insulator (SOI) waveguide, the low refractive index of buried oxide layer enhances the magneto-optic phase shift, which contributes to reduce the device size of isolator. We developed the surface activated direct bonding technique to integrate a magneto-optic garnet crystal onto dissimilar crystals. The performance of SOI waveguide optical isolator was demonstrated with an optical isolation of 21 dB at a wavelength of 1559 nm.
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