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	Multi-gigahertz frequency-modulated vertical-cavity surface emitting laser
	MORGAN, ROBERT, A.
	1998-03-25
著作权人	HONEYWELL INC.
专利号	EP0830718A1
国家	欧洲专利局
文献子类	发明申请
其他题名	Multi-gigahertz frequency-modulated vertical-cavity surface emitting laser
英文摘要	A GHz-range frequency-modulated laser based on manufacturable vertical cavity surface emitting lasers (VCSELs) and arrays. The present invention exploits a saturable absorber contained within the VCSELs distributed Bragg reflector which may itself be adjusted during fabrication or in operation. Under controllable operating conditions, the saturable absorber, strategically sized and placed, will force the VCSEL to self-pulsate (in the GHz-regime) at rates related to the local intensity, absorption, lifetime, and carrier density of the saturable absorber. These conditions can be controlled in real time in one of three ways; first, by adjusting the injection current into the VCSEL itself; second, for a fixed VCSEL bias and the use of a third terminal, by modifying the carrier density within the saturable absorber via additional current injection; or third, the saturable absorber can be reverse-biased by simultaneously altering its absorption and carrier lifetime and thus carrier density. Additionally, the frequency response can be controlled in the fabrication process by affecting the location of the saturable absorber, the mirror design and cavity Q, and the laser size (and hence threshold current). One can easily multiplex numerous GHz channels into a 100 plus GHz transmitter in a cost-effective manner. Application of the saturable absorber for self-pulsation provides for a decoherence of the VCSEL light output to eliminate modal noise in data communication systems, or for use as a local oscillator in an RF or other system. A plurality of VCSELs may be formed into an array having various frequencies, intensities, phases or other properties. The VCSELs may form a phased array, for instance.
公开日期	1998-03-25
申请日期	1996-05-28
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/63269]
专题	半导体激光器专利数据库
作者单位	HONEYWELL INC.
推荐引用方式 GB/T 7714	MORGAN, ROBERT, A.. Multi-gigahertz frequency-modulated vertical-cavity surface emitting laser. EP0830718A1. 1998-03-25.

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