Distributed feedback type semiconductor laser device

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	Distributed feedback type semiconductor laser device
其他题名	Distributed feedback type semiconductor laser device
	MATSUMOTO KENJI; SUZUKI KAZUO
	1988-07-04
专利权人	TOSHIBA CORP
公开日期	1988-07-04
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To make the whole system compact by causing a set at least out of the distributed reflectors to be variable ones where optical propagation constant is variable, thereby controlling optical propagation constant of the variable distributed reflactors by output difference signals of respective photodetectors that are coupled with two distributed reflectors. CONSTITUTION:A semiconductor laser oscillation part is composed of a gain region 10, variable distributed reflectors 13 and 14 where propagation constant is variable as well as a phase adjustment region 15. Moreover, an oscillation wavelength measuring part is composed of a Y-shaped multipoint type waveguide 16 connecting to the variable distributed reflector 14, a distributed reflector 18 having a sligntly longer Bragg wavelength than that connecting to the above waveguide, the distributed reflector 20 having a slightly shorter wavegude than the Bragg wavelength, and photodetectors 19 and 21 connecting to the distributed reflectors 18 and 20. The variable distributed reflectors 13 and 14 are controlled by output difference signals of the photodetectors 19 and 21 and in this way, oscillation wave lengths are controlled. Then, since the gain region 10 is controlled by the output sum signals of the phtodetectors 19 and 21, light output powers can be controlled.
其他摘要	目的：通过使分布式反射器中的至少一组成为可变光学传播常数可变的，使整个系统紧凑，从而通过耦合的各个光电探测器的输出差分信号控制可变分布式反射器的光学传播常数有两个分布式反射器。组成：半导体激光振荡部分由增益区域10，可变分布反射器13和14，其传播常数可变以及相位调整区域15组成。此外，振荡波长测量部分由Y形多点组成连接到可变分布反射器14的类型波导16，具有比连接到上述波导的波长更短的布拉格波长的分布式反射器18，具有比布拉格波长稍短的波长的分布式反射器20，以及连接到布拉格波长的光电探测器19和21。分布式反射器18和20.可变分布反射器13和14由光电探测器19和21的输出差信号控制，并且以这种方式控制振荡波长。然后，由于增益区10由光电探测器19和21的输出和信号控制，所以可以控制光输出功率。
申请日期	1986-12-24
专利号	JP1988160391A
专利状态	失效
申请号	JP1986306510
公开（公告）号	JP1988160391A
IPC 分类号	H01S5/00 \| H01S5/026 \| H01S5/0625 \| H01S5/068 \| H01S5/0683 \| H01S5/12 \| H01S3/133 \| H01S3/18
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/181661/88656
专题	半导体激光器专利数据库
作者单位	TOSHIBA CORP
推荐引用方式 GB/T 7714	MATSUMOTO KENJI,SUZUKI KAZUO. Distributed feedback type semiconductor laser device. JP1988160391A[P]. 1988-07-04.

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