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	Optical integrated circuit
	MATSUMURA HIROYOSHI; SAKANO SHINJI; TSUJI SHINJI; OISHI AKIO; INOUE HIROAKI; HIRAO MOTONAO
	1988-05-13
著作权人	HITACHI LTD
专利号	JP1988108788A
国家	日本
文献子类	发明申请
其他题名	Optical integrated circuit
英文摘要	PURPOSE:To obstruct reflected return beams while stabilizing a laser output and a wavelength by forming a tapered optical guide between a semiconductor laser and the optical guide. CONSTITUTION:An optical integrated circuit is constituted of a semiconductor laser region A and an optical guide region B, an optical guide 1 for a semiconductor laser is shaped in the region A, and a tapered optical guide 2 is formed in the region B. Beams projected by the taper of the optical guide 2 are condensed gradually and changed into an original single mode, and projected to another optcal element, and the single mode reversely reflected from the optical element and being returning is turned slowly into another mode, and mismatched to the waveguide 1, and the projection of a return wave is hindered. A rotational grating 4 is shaped to a section corresponding to the laser section A on the InP substrate 1 for a distributed feedback type semiconductor laser by the irradiation of electron beams, and laser structure having an active layer 5 is formed through an LPE method. A crystal in the tapered optical guide section B is gotten rid of, and the crystal structure of the tapered optical guide 2 is formed through selective epitaxial growth.
公开日期	1988-05-13
申请日期	1986-10-27
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/83171]
专题	半导体激光器专利数据库
作者单位	HITACHI LTD
推荐引用方式 GB/T 7714	MATSUMURA HIROYOSHI,SAKANO SHINJI,TSUJI SHINJI,et al. Optical integrated circuit. JP1988108788A. 1988-05-13.

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