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	光導波路及びそれを用いた光アイソレータ
	織田 仁
	1997-11-14
著作权人	キヤノン株式会社
专利号	JP2719187B2
国家	日本
文献子类	授权发明
其他题名	光導波路及びそれを用いた光アイソレータ
英文摘要	PURPOSE:To align light in phase and to enhance an integrated optical isolator of this design in mode conversion efficiency by a method wherein a waveguide layer is formed of a superlattice structure. CONSTITUTION:Light oscillated in a DBR laser section passes under a metal film 25 which serves as a mode selection film and is not attenuated as it is TL light. When the light concerned is incident on a superlattice waveguide layer 23 from an optical guide path 16, it is partially reflected due to the refractive index difference between them. But, as the joined faces of them are tilted against a travelling direction of light by an angle of a few degrees, the reflected light is projected outside of a ridge and does not return to a laser oscillation section. The light polarized by an angle of 45 degrees as propagating through the waveguide layer 23 is projected passing through a polarizing plate 26 which has a main axis extended in that direction. The return light of the projected light reflected from an end face is made to enable only its 45 degree polarized component to pass through the polarizing plate 26, but while it travels through the waveguide layer 23 in the opposite direction, it is furthermore converted in mode and becomes a TM wave at an interface between an isolator and a laser due to the nonreciprocity of the magnetooptic effect. In result, the return light is absorbed by the metal film 25 and prevented from returning to the laser.
公开日期	1998-02-25
申请日期	1989-05-08
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/44445]
专题	半导体激光器专利数据库
作者单位	キヤノン株式会社
推荐引用方式 GB/T 7714	織田 仁. 光導波路及びそれを用いた光アイソレータ. JP2719187B2. 1997-11-14.

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