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	Light feedback type semiconductor laser
	FUJITA TOSHIHIRO; ISHIZUKA SATOSHI; FUJITO KATSUYUKI
	1985-03-12
著作权人	MATSUSHITA DENKI SANGYO KK
专利号	JP1985046089A
国家	日本
文献子类	发明申请
其他题名	Light feedback type semiconductor laser
英文摘要	PURPOSE:To suppress a reflecting noise and to contrive laterally and longitudinally completely unify an oscillation mode in a semiconductor laser unit as a light source for an optical fiber communication by feeding back the laser light as a reflected light to a laser element via a reflector disposed externally. CONSTITUTION:A reflected light 6 emitted from the resonance end face 2 of a semiconductor laser element 1 and reflected on a reflector 5 and the reflector 5 is adjusted to bring the phase of the laser light in the element 1 in coincidence on the end face 2. A laser light 8 emitted from the end face 7 of a resonator is coupled to a fiber 9, branched by a beam splitter 11, one is pbserved for the longitudinal mode spectrum by a spectroscope 12, and the other is received by a photodiode 13 to observe the noise spectrum by a spectral analyzer 15. Lateral and longitudinal complete sole mode state is maintained in a low noise level extremely to the certain modulation factor, the threshold modulation factor of the limit to be maintained is increased to shorten the distance 16 between the end face 2 and the reflector 5, and when the distance 16 is 15mm. or less, it is extremely effective as a light source for an analog light communication for the noise to become a problem.
公开日期	1985-03-12
申请日期	1983-08-24
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62895]
专题	半导体激光器专利数据库
作者单位	MATSUSHITA DENKI SANGYO KK
推荐引用方式 GB/T 7714	FUJITA TOSHIHIRO,ISHIZUKA SATOSHI,FUJITO KATSUYUKI. Light feedback type semiconductor laser. JP1985046089A. 1985-03-12.

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