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2024年4月19日发(作者：德国止步小组赛)

专利内容由知识产权出版社提供

专利名称：DEVICE FOR CONSTRICTING SPECTRUM

LINE WIDTH OF SEMICONDUCTOR LASER

发明人：OTSU GENICHI,YOSHIDA JUNICHI,IMAI

TORU

申请号：JP25915288

申请日：19881014

公开号：JPH02106083A

公开日：19900418

摘要：PURPOSE:To assure the stable spectrum line width constriction by a method

wherein an optical path setting up means is provided so that a part of laser beams

resonated in a photoresonator may be fed back to a semiconductor laser but the

reflected beams on the incident part of the photoresonator may not be fed back to the

semiconductor laser. CONSTITUTION:The incident beams emitted from a semiconductor

laser 1 reach an incident end A of a photoresonator 2 through a condenser 3 so that the

laser beams reflected on the incident end A may be obliquely entered into the incident

end A not to be fed back to the semiconductor laser 1. When the optical path of

resonator is around integer times of the wave length of laser beams entered into the

photoresonator 2, a resonator will be caused to externally emit the resonant beams in

multiple directions while the resonant beams in one direction b is fed back to the

semiconductor laser 1 along the optical axis of the incident beams. These fed back beams

furnished with the data only on the resonance characteristics of the photoresonator 2 is

brightened only when the beams are resonated with the resonance frequency of the

photoresonator 2. Through these procedures, when the optical path from the

semiconductor laser 1 to the incident part of the photoresonator 2 is around integer

times of laser wave length, the semiconductor laser 1 can bring about the self retracting

effect thus assuring the stable spectrum line width constriction.

申请人：TOKYO KOKU KEIKI KK

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