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	Intermodal phase difference controller for beam angle modulation in index guided semiconductor devices
	MERRITT, SCOTT A.
	2002-06-11
著作权人	MERRITT SCOTT A.
专利号	US6404793
国家	美国
文献子类	授权发明
其他题名	Intermodal phase difference controller for beam angle modulation in index guided semiconductor devices
英文摘要	A novel device and method of beam steering for semiconductor lasers or optical amplifiers is disclosed. The method of the present invention achieves high signal extinction ratios, high speed, low chirp modulation by biasing a multi-lateral mode beam steering section. The device of the present invention comprises an active single vertical and lateral mode optical waveguide, a multi-lateral mode waveguide, and a mode converter. The mode converter efficiently couples output from an active single mode waveguide to two or more modes of a multi-lateral mode waveguide. Two guided modes arrive at a device facet with a particular intermodal phase difference based on initial mode phasing, multi-lateral mode waveguide length and modal dispersion properties, and facet angle. Beam steering is achieved through carrier antiguiding effect by injecting current into the multi-lateral mode waveguide from the mode converter thus changing the intermodal dispersion. Changing the intermodal phase difference changes the direction of beam propagation relative to the device facet, providing enhanced beam steering.
公开日期	2002-06-11
申请日期	2000-08-30
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/47688]
专题	半导体激光器专利数据库
作者单位	MERRITT SCOTT A.
推荐引用方式 GB/T 7714	MERRITT, SCOTT A.. Intermodal phase difference controller for beam angle modulation in index guided semiconductor devices. US6404793. 2002-06-11.

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