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	Optical filter device
	LAMING, RICHARD I.; LOH, WEI-HUNG; PAYNE, DAVID N.; ZERVAS, MICHAEL N.
	1999-07-27
著作权人	UNIVERSITY OF SOUTHAMPTON
专利号	US5930435
国家	美国
文献子类	授权发明
其他题名	Optical filter device
英文摘要	PCT No. PCT/GB95/01141 Sec. 371 Date May 1, 1997 Sec. 102(e) Date May 1, 1997 PCT Filed May 19, 1995 PCT Pub. No. WO95/32451 PCT Pub. Date Nov. 30, 1995Passive, self-adjusting and tracking optical wavelength filters are described. The filters are absorptive and can be of either transmissive or reflective type. The filters comprise an unpumped doped optical waveguide configured so that signals of different wavelength are spatially decoupled to some extent. The self-adjustment of the filter centre wavelength is achieved by the combined effects of the power-dependent saturable absorption, provided by an appropriate dopant, and partial longitudinal hole burning provided by the spatial decoupling of the different wavelengths. External cavity lasers using this type of filter in the external cavity are also described. This external cavity configuration can provide stable single frequency operation of, for example, a semiconductor laser. By using a saturable absorber for the external cavity (e.g. an erbium doped fibre), longitudinal mode-hopping can be suppressed, ensuring single frequency operation.
公开日期	1999-07-27
申请日期	1995-05-19
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/38961]
专题	半导体激光器专利数据库
作者单位	UNIVERSITY OF SOUTHAMPTON
推荐引用方式 GB/T 7714	LAMING, RICHARD I.,LOH, WEI-HUNG,PAYNE, DAVID N.,et al. Optical filter device. US5930435. 1999-07-27.

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