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	Optical transmitter comprising a stepwise tunable laser
	GARNACHE, ARNAUD; ROMANINI, DANIELE; STOECKEL, FREDERIC; KATCHANOV, ALEXANDRE; KNIPPELS, GUIDO; PALDUS, BARBARA; RELLA, CHRISTOPHER; RICHMAN, BRUCE; LEVENSON, MARC
	2003-08-26
著作权人	BLUE LEAF INC.
专利号	US6611546
国家	美国
文献子类	授权发明
其他题名	Optical transmitter comprising a stepwise tunable laser
英文摘要	An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which corresponding to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, that tuning arrangement comprises a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another. An optical modulator adds modulation to a beam emitting from the laser to provide the information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described. The parameters of the amplifying mirror and tuning arrangement can be adjusted during operation to switch quickly from one cavity mode to another in stepwise fashion.
公开日期	2003-08-26
申请日期	2001-08-15
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/35434]
专题	半导体激光器专利数据库
作者单位	BLUE LEAF INC.
推荐引用方式 GB/T 7714	GARNACHE, ARNAUD,ROMANINI, DANIELE,STOECKEL, FREDERIC,et al. Optical transmitter comprising a stepwise tunable laser. US6611546. 2003-08-26.

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