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	Optical waveguide grating coupler device
	SUNAGAWA, HIROSHI
	1992-03-31
著作权人	FUJIFILM CORPORATION
专利号	US5101459
国家	美国
文献子类	授权发明
其他题名	Optical waveguide grating coupler device
英文摘要	An optical waveguide device comprises an optical waveguide for guiding an optical wave therethrough, and a grating coupler, which is located on a surface of the optical waveguide and which couples the guided optical wave traveling in the optical waveguide with an external optical wave. The grating coupler is provided with a plurality of bars, the heights h of which vary linearly in the direction along which the guided optical wave travels. The inclination b of the variation of the bar heights h satisfies the conditionwhere a represents a coefficient which determines a radiation loss coefficient alpha ( alpha =ah2), and L represents the length of the grating coupler, which length is taken in the direction along which the guided optical wave travels. The guided optical wave is radiated very efficiently as an approximately Gaussian beam out of the optical waveguide, or an external optical wave, which takes on the form of a Gaussian beam, is introduced very efficiently into the optical waveguide.
公开日期	1992-03-31
申请日期	1991-06-06
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/36043]
专题	半导体激光器专利数据库
作者单位	FUJIFILM CORPORATION
推荐引用方式 GB/T 7714	SUNAGAWA, HIROSHI. Optical waveguide grating coupler device. US5101459. 1992-03-31.

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