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	Ring laser gyro device
	NAKAMURA SHIGERU; HOJO TAKESHI
	1992-05-27
著作权人	株式会社トキメック
专利号	JP1992154179A
国家	日本
文献子类	发明申请
其他题名	Ring laser gyro device
英文摘要	PURPOSE:To scarcely generate a lock-in phenomenon and to reduce in size an entire device by composing a substantially circular optical waveguide of a light emitting element and an optical resonator, cutting out part of the waveguide, and inserting a Faraday element. CONSTITUTION:An optical resonator of an output light of a light emitting element 19 is composed of a substantially circular optical waveguide 14 provided on a gyro board 12, and a light turning in one direction and a light turning in the other direction exist in mixture in the resonator. A beat signal is obtained through a directional coupler 16, a Y-type branched coupler 17 and a photodetector 18A, and the rotating angular speed of the resonator can be detected by the frequency of the signal. Part of the waveguide 14 is partly cut out, and a Faraday element 20 is inserted to provide a desired phase difference between the light turning in one direction and the light turning in the other direction in the resonator. Since an optical fiber is not used, a large scale lock-in phenomenon caused by the internal scattering of the fiber does not occur, and the waveguide is reduced in size, and hence the entire device can be reduced in size.
公开日期	1992-05-27
申请日期	1990-10-18
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/88410]
专题	半导体激光器专利数据库
作者单位	株式会社トキメック
推荐引用方式 GB/T 7714	NAKAMURA SHIGERU,HOJO TAKESHI. Ring laser gyro device. JP1992154179A. 1992-05-27.

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