Laser drive unit and information recording/reproducing apparatus

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	Laser drive unit and information recording/reproducing apparatus
其他题名	Laser drive unit and information recording/reproducing apparatus
	KUREBAYASHI, MASAAKI; ASADA, AKIHIRO; KAKU, TOSHIMITSU; OONUKI, HIDEO; HOSHINO, TAKASHI; KANDOU, HIDEHIKO
	2002-11-26
专利权人	HITACHI CONSUMER ELECTRONICS CO., LTD.
公开日期	2002-11-26
授权国家	美国
专利类型	授权发明
摘要	A laser drive (LD) unit 1 according to the present invention is provided with a laser drive waveform controller 6, into which information for setting the laser drive is entered from a controller 2, for generating a laser drive waveform on the basis of that information and supplying an indicated amperage; an LD current setting unit 7 for setting a laser drive current matching the indicated amperage; an LD current output unit 8 for varying the laser drive current on the basis of the laser drive waveform and supplying the current so varied to a laser diode 3; and a current setting corrector 9, into which a monitor signal obtained at the time of monitoring the laser beam emission from the laser diode 3 is monitored, for correcting the laser drive current set by the current setting unit 7 by using that monitor signal to adjust the power of the laser diode 3. The laser drive waveform controller 6, current setting unit 7, current output unit 8 and current setting corrector 9 are formed on the same substrate.
其他摘要	根据本发明的激光驱动（LD）单元1设置有激光驱动波形控制器6，用于设置激光驱动的信息从控制器2输入到激光驱动波形控制器6中，用于基于该信息产生激光驱动波形。并提供指定的安培数; LD电流设定单元7，用于设定与所示安培数相匹配的激光驱动电流; LD电流输出单元8，用于根据激光驱动波形改变激光器驱动电流，并将如此变化的电流提供给激光二极管3;电流设定校正器9，监测从监测激光二极管3的激光束发射时获得的监测信号，用于校正由电流设定单元7设定的激光驱动电流，利用该监测信号进行调节激光驱动波形控制器6，电流设定单元7，电流输出单元8和电流设定校正器9形成在同一基板上。
申请日期	2000-01-25
专利号	US6487154
专利状态	授权
申请号	US09/490598
公开（公告）号	US6487154
IPC 分类号	G11B7/125 \| G11B5/55 \| G11B7/0045 \| H01S5/00 \| H01S5/062 \| H01S5/0683
专利代理人	-
代理机构	TOWNSEND AND TOWNSEND AND CREW LLP
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/33648
专题	半导体激光器专利数据库
作者单位	HITACHI CONSUMER ELECTRONICS CO., LTD.
推荐引用方式 GB/T 7714	KUREBAYASHI, MASAAKI,ASADA, AKIHIRO,KAKU, TOSHIMITSU,et al. Laser drive unit and information recording/reproducing apparatus. US6487154[P]. 2002-11-26.

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