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	System for modulating laser power for recording
	AOKI GIICHI
	1989-02-16
著作权人	NIKON CORP
专利号	JP1989043816A
国家	日本
文献子类	发明申请
其他题名	System for modulating laser power for recording
英文摘要	PURPOSE:To cause the rise of a highest temperature distribution curve to be step and large by executing the necessary control of the laser power of the constant section immediately before and after the rise of a recording signal. CONSTITUTION:An output (a) to obtain the timing of data from a circuit part 1 and an output (b) to shift one clock are supplied to a circuit part 4 equipped with delaying elements 5a and 5b, an inverter 6, an AND gate 7, etc. A signal (e) to shift, for several clocks, a recording signal, a constant section detecting signal (h) immediately after a recording signal rise and a constant section detecting signal (g) immediately before the rise are impressed to respective current generating circuits 13-16 from a circuit part 8 having D type FF9-12. The output of these generating devices 13-15, etc., is supplied through an adding point to a laser diode LD, and for the constant section immediately before the rise of the recording signal, the laser power is lowered and for the constant section after the rise, the power is strengthened. Thus, the rise of the highest temperature distribution curve at the time of recording is steep and large, the temperature dependency is minimized and a recording margin is made larger.
公开日期	1989-02-16
申请日期	1987-08-10
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59521]
专题	半导体激光器专利数据库
作者单位	NIKON CORP
推荐引用方式 GB/T 7714	AOKI GIICHI. System for modulating laser power for recording. JP1989043816A. 1989-02-16.

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