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	Laser driver
	SASAKI HIROSHI; WATABE ATSUMI; SATO YOSHIO; TSUBOI NOBUYOSHI; SHIMADA SATOSHI; KOYANAGI HIROAKI; MIYAMOTO NORIFUMI; MINEMURA HIROYUKI; NIHEI HIDEKI
	1987-11-10
著作权人	HITACHI LTD
专利号	JP1987257640A
国家	日本
文献子类	发明申请
其他题名	Laser driver
英文摘要	PURPOSE:To obtain a laser driver with highly accurate irradiating time by providing a switching function to an electronic circuit driving a laser to control the irradiated luminous quantity of the laser by a digital signal. CONSTITUTION:When digital setting signals DW1-DW3 setting, e.g., the luminous quantity of a laser are all at high level '1', a maximum output is obtained, and when all are at low level '0', the output is zero, and a 3-bit control command is issued where the least significant digit is DW1 and the most significant digit is DW3. A gate pulse G commanding the time to drive the laser gives a required pulse width and when the transmission line calls for a long range, it is also required to widen the pulse width TW required actually. A gate pulser 1 is used for modulation as the reduction or extension of the pulse width supplied from a gate pulse G and the output signal is a laser drive signal GTW. An electronic circuit section 2 generates a pulsive laser light PW depending on the condition supplied by the digital setting signals DW1-DW3 and the laser drive signal GTW.
公开日期	1987-11-10
申请日期	1986-05-02
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/68867]
专题	半导体激光器专利数据库
作者单位	HITACHI LTD
推荐引用方式 GB/T 7714	SASAKI HIROSHI,WATABE ATSUMI,SATO YOSHIO,et al. Laser driver. JP1987257640A. 1987-11-10.

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