Semiconductor laser device

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	Semiconductor laser device
其他题名	Semiconductor laser device
	KURODA TAKAROU; KAYANE NAOKI; OOUCHI HIROBUMI
	1983-11-16
专利权人	HITACHI SEISAKUSHO KK
公开日期	1983-11-16
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To eliminate the noises included in a laser output within a signal band of an optical disk, by providing a series resonance circuit having a resonance frequency within a signal band of the optical disk in parallel to a semiconductor laser element which is driven with a fixed level of optical output. CONSTITUTION:An LCR series resonance circuit 14 which functions as a noise filter circuit is set in parallel to a semiconductor laser 11 which is driven by a constant optical output driving circuit 13. Then the resonance frequency fO is set at the center frequency of the signal band of an optical disk. The impedance of the filter circuit 14 is sufficiently reduced with the frequency fO, and therefore both ends of the laser 11 are short-circuited. As a result, the component near the frequency fO is quickly reduced and elminated among the noise type optical output fluctuations due to the light returned from the optical disk.
其他摘要	目的：通过提供一个串联谐振电路来消除光盘信号频带内激光输出中包含的噪声，该谐振电路的谐振频率在光盘的信号频带内与半导体激光元件并联，该半导体激光元件由一个半导体激光元件驱动。固定水平的光输出。组成：用作噪声滤波器电路的LCR串联谐振电路14与半导体激光器11并联设置，半导体激光器11由恒定光输出驱动电路13驱动。然后，谐振频率fO设置在信号的中心频率光盘带。滤波器电路14的阻抗随频率f0充分减小，因此激光器11的两端短路。结果，由于从光盘返回的光，频率f0附近的分量在噪声型光输出波动中迅速减小和消除。
申请日期	1982-05-12
专利号	JP1983196630A
专利状态	失效
申请号	JP1982078253
公开（公告）号	JP1983196630A
IPC 分类号	G06K7/10 \| G11B7/125 \| G11B7/126 \| H01S5/042 \| H01S5/068 \| G11B7/12 \| H01S3/096
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/181661/68659
专题	半导体激光器专利数据库
作者单位	HITACHI SEISAKUSHO KK
推荐引用方式 GB/T 7714	KURODA TAKAROU,KAYANE NAOKI,OOUCHI HIROBUMI. Semiconductor laser device. JP1983196630A[P]. 1983-11-16.

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