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	Setting laser current based on modulation level of an optical power sensor measurement
	RAUSCH, TIM; GAGE, EDWARD CHARLES; CHRISTENSEN, JOSHUA WARD; LAMMERS, TODD MICHAEL
	2018-04-26
著作权人	SEAGATE TECHNOLOGY LLC
专利号	US20180114542A1
国家	美国
文献子类	发明申请
其他题名	Setting laser current based on modulation level of an optical power sensor measurement
英文摘要	Before writing to a heat-assisted magnetic recording medium, a DC signal modulated with an AC signal is applied to a laser of a read/write head. A modulation level of an optical power sensor is measured, the optical power sensor being coupled to detect optical output of the laser in response to the modulated current. A target value of the DC signal that causes the modulation levels to reach a predetermined value between zero and a maximum value is determined and used to set a bias current for subsequent activation of the laser based.
公开日期	2018-04-26
申请日期	2017-08-08
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62304]
专题	半导体激光器专利数据库
作者单位	SEAGATE TECHNOLOGY LLC
推荐引用方式 GB/T 7714	RAUSCH, TIM,GAGE, EDWARD CHARLES,CHRISTENSEN, JOSHUA WARD,et al. Setting laser current based on modulation level of an optical power sensor measurement. US20180114542A1. 2018-04-26.

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