Single mode oscillation monitor

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	Single mode oscillation monitor
其他题名	Single mode oscillation monitor
	CHIKAMA TERUMI; GOTO MASAMI; ONODA YOSHITO
	1986-06-30
专利权人	FUJITSU LTD
公开日期	1986-06-30
授权国家	日本
专利类型	发明申请
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.
其他摘要	目的：通过基于光的最大值和最小值之间的差异进行监视来省略用于监视的LD的温度控制，该光通过以指定角速度旋转的标准具。组成：LD2的输出光由镜头3会聚，并获得平行光。部分光从分束器4中取出。分裂光通过标准具板8，标准板8连接到具有电致伸缩元件9a和9b的音叉7上。标准具板8在来自驱动电路10的信号周期振动。振动宽度（旋转角度）由振动周期和电压控制。例如，输入通过标准具的光的至少一个峰值。透射光由光接收器11接收，由放大器12放大，并由AD转换器13转换成数字信号。时隙约为标准具精细度的几倍。然后，最大值Pmax和最小值Pmin由最大值检测电路14和最小值检测电路15检测。（Pmax-Pmin）/（Pmax + Pmin）的计算由操作电路16执行。
主权项	-
申请日期	1984-12-17
专利号	JP1986142784A
专利状态	失效
申请号	JP1984265683
公开（公告）号	JP1986142784A
IPC 分类号	H01S5/00 \| H01S5/068 \| H01S3/133
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	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[P]. 1986-06-30.

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