Laser driver with noise reduction feedback

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	Laser driver with noise reduction feedback
其他题名	Laser driver with noise reduction feedback
	VERBOOM, JOHANNES J.; BROOKE, JEFFREY M.; KLINE, GARY L.
	2003-11-26
专利权人	PLASMON LMS, INC.
公开日期	2003-11-26
授权国家	欧洲专利局
专利类型	发明申请
摘要	In order to provide a low noise laser beam, a noise reducing feedback network is provided which creates a noise reducing signal and provides that signal to the laser (12) itself. In order to produce the noise reducing signal, the operation of the laser (12) is monitored and the feedback signal is a direct result of this monitoring. Monitoring is accomplished by a fast-forward sense detector (40), which receives a portion of the laser beam (30) from the operating laser (12). The output from this fast-forward sense detector (40) is provided to an amplifier (46) which inverts and amplifies the signal. A noise reduction feedback network (60) then receives the amplified signal, appropriately filters this signal, and provides it to the laser (12) itself so as to reduce noise in the laser-beam for the frequency band of importance for reading the recorded data from the optical medium. The noise reduction feedback signal further has sufficiently high impedance so as to not disturb the traditional CW operation of the laser (12) and to avoid interference with the traditional RF modulation of the laser (12).
其他摘要	为了提供低噪声激光束，提供降噪反馈网络，其产生降噪信号并将该信号提供给激光器（12）本身。为了产生降噪信号，监测激光器（12）的操作，并且反馈信号是该监测的直接结果。通过快进检测器（40）完成监测，该检测器从工作激光器（12）接收一部分激光束（30）。该快进检测器（40）的输出提供给放大器（46），放大器（46）反转并放大信号。然后，降噪反馈网络（60）接收放大的信号，适当地过滤该信号，并将其提供给激光器（12）本身，以便减少激光束中的噪声，用于读取记录数据的重要频带。来自光学媒介。降噪反馈信号还具有足够高的阻抗，以便不干扰激光器（12）的传统CW操作并且避免干扰激光器（12）的传统RF调制。
主权项	A low noise laser control system comprising: an optical sensor positioned to receive a portion of a light signal generated by the laser and produce a signal indicative of the laser beam generated by the laser; and a noise reduction feedback network operatively connected to the optical sensor and to the laser, the noise reduction feedback network including filtering and impedance characteristics so as to produce a noise reduction signal which is provided to the laser.
申请日期	2002-05-08
专利号	EP1261084A3
专利状态	失效
申请号	EP2002253212
公开（公告）号	EP1261084A3
IPC 分类号	H01S5/068 \| H01S5/0683 \| H01S5/0687 \| G11B7/125
专利代理人	-
代理机构	FENLON, CHRISTINE LESLEY
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/60828
专题	半导体激光器专利数据库
作者单位	PLASMON LMS, INC.
推荐引用方式 GB/T 7714	VERBOOM, JOHANNES J.,BROOKE, JEFFREY M.,KLINE, GARY L.. Laser driver with noise reduction feedback. EP1261084A3[P]. 2003-11-26.

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