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	Multi-wavelength light detecting and/or emitting apparatuses having serially arranged grating directional couplers
	SAKATA, HAJIME; TAKEUCHI, SHINSUKE
	1993-08-03
著作权人	CANON KABUSHIKI KAISHA
专利号	US5233187
国家	美国
文献子类	授权发明
其他题名	Multi-wavelength light detecting and/or emitting apparatuses having serially arranged grating directional couplers
英文摘要	In a multi-wavelength light detecting and/or emitting apparatus, there are provided of a first unit of a first directional coupler having a grating for an optical coupling function and a photodetector having a photoelectric conversion function and a second unit of a second directional coupler having a grating for an optical coupling function and a semiconductor laser, and a common light waveguide extending parallel with the unit in a light propagating direction. The first directional coupler and the photodetector are serially arranged in the light propagating direction and parallel with the common light waveguide, and the second directional coupler and the semiconductor laser are serially arranged in the light propagating direction and parallel with the common light waveguide. When there are formed a plurality of the first units and the gratings have different pitches, wavelength multiplexed light signals can be simultaneously detected per each wavelength with an equal detection performance. When there are formed a plurality of the second units and the gratings have different pitches, laser lights of different wavelengths can be emitted from a single emission end of the common waveguide and the semiconductor lasers can be independently driven.
公开日期	1993-08-03
申请日期	1992-11-17
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/39771]
专题	半导体激光器专利数据库
作者单位	CANON KABUSHIKI KAISHA
推荐引用方式 GB/T 7714	SAKATA, HAJIME,TAKEUCHI, SHINSUKE. Multi-wavelength light detecting and/or emitting apparatuses having serially arranged grating directional couplers. US5233187. 1993-08-03.

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