Waveguide Optical Isolators for Integrated Optics
Waveguide Optical Isolators for Integrated Optics
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DOI：
10.1109/jqe.2011.2168194
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发表时间：
2012-02-01
影响因子：
2.5
通讯作者：
Shoji, Yuya
中科院分区：
文献类型：
--
作者：
Mizumoto, Tetsuya;Takei, Ryohei;Shoji, Yuya
研究了波导光隔离器在集成光学中的应用。非互易损耗位移隔离器具有与光学有源器件高度兼容的优点。干涉型波导光隔离器利用一阶磁光效应产生的非互易相移，适用于各种波导平台。在绝缘体上硅（SOI）波导中，埋氧层的低折射率增强了磁光相移，这有助于减小隔离器的器件尺寸。我们发展了表面活化直接键合技术，将磁光石榴石晶体集成到不同的晶体上。实验结果表明，SOI波导光隔离器在1559 nm波长处的光隔离度为21 dB。
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.