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	Semiconductor optical devices and methods of making them
	ROGERS, DAVID CARNEGIE; MOODIE, DAVID GRAHAM; LEALMAN, IAN FRANCIS; PERRIN, SIMON DAVID
	2003-05-22
著作权人	CORNING INCORPORATED
专利号	US20030095751A1
国家	美国
文献子类	发明申请
其他题名	Semiconductor optical devices and methods of making them
英文摘要	An optical monomode guided-wave device, especially an electroabsorption modulator, having an active region with a mode size small compared with that of an optical fibre is integrated with at least one passive spot size adjuster which has an optical core that tapers simultaneously from a width and height substantially equal to those of the active region adjacent to that region to a width large compared with the width of the active region and a thickness substantially smaller than the thickness of the active region at a position remote from that region. Usually-unless the device includes its own light source-there will be two spot size adjusters, respectively at the inlet and outlet of the device. The device is a buried hetero-structure device; its optical core tapers smoothly in both width and height; the dimensions of the core are such that there is an optical transmission mode for which the effective refractive index difference between the mode and any other mode (including the radiation field) is large enough to ensure that no more than 20% (preferably 5%) of light entering one end of the guided wave device in that mode will be lost by scattering or coupling; and the mode size at the distal end of the spot-size adjuster is substantially larger than its mode size in the active region. The simultaneous smooth tapers can be obtained by taking advantage of the characteristics of the mass-transport limited MOVPE technique, depositing in a narrow channel defined between two deposit-resist bands, the thickness deposited, at least in the centre of the channel, varying in a direct sense with the widths of the adjacent bands and in an inverse sense with the width of the channel.
公开日期	2003-05-22
申请日期	2002-11-15
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/52910]
专题	半导体激光器专利数据库
作者单位	CORNING INCORPORATED
推荐引用方式 GB/T 7714	ROGERS, DAVID CARNEGIE,MOODIE, DAVID GRAHAM,LEALMAN, IAN FRANCIS,et al. Semiconductor optical devices and methods of making them. US20030095751A1. 2003-05-22.

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