Semiconductor laser driving device

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	Semiconductor laser driving device
其他题名	Semiconductor laser driving device
	KARAKI MORIHIRO; SHINODA MASAHISA; SATO YASUYUKI
	1990-01-12
专利权人	三菱電機株式会社
公开日期	1990-01-12
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To eliminate the need of the separate detection of each optical output, to relax the positioning accuracy and to improve the mass-producing property by receiving laser beams from plural pieces of light sources in a lump by a two-division photodetector, and calculating an optical output signal, and detecting separately optical outputs from each light source. CONSTITUTION:A front laser luminous flux from two pieces of laser light sources of a semiconductor laser array 6 is divided into two by a beam splitter 20, and one of them is received in a lump by a two-division photodetector 22. Subsequently, an optical output signal passes through current/voltage converters 23, 24 and processed by an arithmetic circuit means having differential amplifiers 25, 27 and amplifiers 26, 28 and 29, the corresponding output of the detector 22 corresponding to a front light 12b is calculated as the product of a difference output of the transducers 23, 24 and a proportional constant K2 corresponding to an amplification factor of the amplifier 28, and in the same way, the corresponding output of the front light 12a is calculated and optical outputs of each light source are detected separately. Next, based on the detected output, the intensity of a laser light from each light source is adjusted so as to be made constant through driving circuits 30a, 30b. According to such constitution, it is unnecessary to detect separately each optical output, and the constitution of an optical system is simplified.
其他摘要	目的：为了消除对每个光输出的分离检测的需要，通过由二分光电探测器一次接收来自多个光源的激光束来放宽定位精度并提高质量产生性能，并且计算光输出信号，并且分别检测来自每个光源的光输出。构成：来自半导体激光器阵列6的两个激光光源的正面激光光通量被分束器20分成两部分，并且它们中的一个通过双分光电探测器22一次全部接收。随后，光输出信号通过电流/电压转换器23,24并由具有差分的算术电路装置处理放大器25,27和放大器26,28和29，对应于前光12b的检测器22的对应输出被计算为换能器23,24的差输出和对应于放大因子的比例常数K2的乘积并且以相同的方式计算前灯12a的相应输出，并分别检测每个光源的光输出。接下来，基于检测到的输出，通过驱动电路30a，30b调节来自每个光源的激光的强度以使其恒定。根据这种结构，不需要分别检测每个光输出，并且光学系统的结构是这样的简化。
申请日期	1988-06-28
专利号	JP1990009026A
专利状态	失效
申请号	JP1988158070
公开（公告）号	JP1990009026A
IPC 分类号	G11B7/125 \| H01S5/00 \| H01S5/068 \| 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/181661/69002
专题	半导体激光器专利数据库
作者单位	三菱電機株式会社
推荐引用方式 GB/T 7714	KARAKI MORIHIRO,SHINODA MASAHISA,SATO YASUYUKI. Semiconductor laser driving device. JP1990009026A[P]. 1990-01-12.

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