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	Vertical cavity laser light beam monitored by reflection of a half mirror, with application in optical pick-up
	MUN, JONG-KUK
	1997-09-02
著作权人	QIANG TECHNOLOGIES, LLC
专利号	US5663944
国家	美国
文献子类	授权发明
其他题名	Vertical cavity laser light beam monitored by reflection of a half mirror, with application in optical pick-up
英文摘要	There is provided a device for monitoring the light output of a VCSEL and a recording and reproducing optical pick-up adopting the device. The device for monitoring the light output of a VCSEL has a half mirror positioned in front of a VCSEL, for reflecting a portion of the light emitted from the VCSEL, and a monitoring optical detector positioned behind the VCSEL, for detecting the light reflected from the half mirror. The recording and reproducing optical pick-up employing the device includes a VCSEL having a light-emitting surface for emitting light vertically from the light-emitting surface, a light output monitor for monitoring the light output of the VCSEL, an objective lens for concentrating incident light on an optical recording medium to form an optical spot thereon, a light path changer for changing a path of the light reflected from the optical recording medium, and a first optical detector for receiving the reflected light and detecting an error signal and an information signal. The light output monitor comprises a half mirror positioned in front of the VCSEL, for reflecting a portion of the light emitted from the VCSEL, and a second monitoring optical detector positioned behind the VCSEL, for detecting the light reflected from the half mirror.
公开日期	1997-09-02
申请日期	1995-12-29
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/40725]
专题	半导体激光器专利数据库
作者单位	QIANG TECHNOLOGIES, LLC
推荐引用方式 GB/T 7714	MUN, JONG-KUK. Vertical cavity laser light beam monitored by reflection of a half mirror, with application in optical pick-up. US5663944. 1997-09-02.

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