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	In-line fiber optic memory
	DESURVIRE, EMMANUEL; DIGONNET, MICHEL J.F.; SHAW, HERBERT J.
	1990-12-27
著作权人	THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
专利号	EP0237184B1
国家	欧洲专利局
文献子类	授权发明
其他题名	In-line fiber optic memory
英文摘要	A fiber optic recirculating memory comprises a splicefree length of optical fiber (10, 134) which forms a loop (14, 130) that is optically closed by means of a fiber optic coupler (20, 136). The coupler (20, 136) couples an optical signal input pulse to the loop (14, 130) for circulation therein, and outputs a portion of the signal pulse on each circulation to provide a series of output pulses. A pump source (34, 140) is included to pump the fiber loop (14, 130) with a pump signal having sufficient intensity to cause stimulated Raman scattering in the fiber loop (14, 130), and thereby cause amplification of the circulating signal pulse. The fiber characteristics, coupler characteristics, and pump power are selected to yield a Raman gain which compensates for the total roundtrip losses in the fiber loop (14, 130), so as to provide an output pulse train of constant amplitude pulses. The invention may be implemented utilizing a standard coupler (20, 136) with a pump signal modulation technique. The pump signal is input to the loop (14, 130) as a series of pulses having a duration and a periodicity chosen to prevent overlap of recirculating pump pulses with input pump pulses until at least two circulations of the loop (14, 130), which minimizes pump power fluctuations and will therefore enhance output signal stability.
公开日期	1990-12-27
申请日期	1987-02-10
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/35861]
专题	半导体激光器专利数据库
作者单位	THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
推荐引用方式 GB/T 7714	DESURVIRE, EMMANUEL,DIGONNET, MICHEL J.F.,SHAW, HERBERT J.. In-line fiber optic memory. EP0237184B1. 1990-12-27.

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