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	Single mode oscillation monitor
	CHIKAMA TERUMI; GOTO MASAMI; ONODA YOSHITO
	1986-06-30
著作权人	FUJITSU LTD
专利号	JP1986142784A
国家	日本
文献子类	发明申请
其他题名	Single mode oscillation monitor
英文摘要	PURPOSE:To omit temperature control of an LD for monitoring, by performing monitoring based on the difference between the maximum value and the minimum value of light, which has passed an etalon that is rotated at a specified angular velocity. CONSTITUTION:The output light of an LD2 is converged by a lens 3 and the parallel light is obtained. Part of the light is taken out of a beam splitter 4. The split light is made to pass an etalon plate 8, which is attached to a tuning fork 7 having electrostriction elements 9a and 9b. The etalon plate 8 is vibrated at a period of a signal from a driving circuit 10. The vibration width (rotary angle) is controlled by the vibration period and a voltage. For example, at least one of the peaks of the light passing the etalon is inputted. The transmitted light is received by a light receiver 11, amplified by an amplifier 12 and converted into a digital signal by an AD converter 13. The time slot is about several times the finesse of the etalon. Then, the maximum value Pmax and the minimum value Pmin are detected by a maximum value detecting circuit 14 and a minimum value detecting circuit 15. The computation of (Pmax-Pmin)/(Pmax+Pmin) is performed by an operating circuit 16.
公开日期	1986-06-30
申请日期	1984-12-17
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62955]
专题	半导体激光器专利数据库
作者单位	FUJITSU LTD
推荐引用方式 GB/T 7714	CHIKAMA TERUMI,GOTO MASAMI,ONODA YOSHITO. Single mode oscillation monitor. JP1986142784A. 1986-06-30.

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