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	Method and apparatus for mode conversion in a tunable laser
	DOERR, CHRISTOPHER RICHARD; STULZ, LAWRENCE WARREN
	2005-02-17
著作权人	LUCENT TECHNOLOGIES INC.
专利号	US20050036739A1
国家	美国
文献子类	发明申请
其他题名	Method and apparatus for mode conversion in a tunable laser
英文摘要	Spot-size conversion for interfacing a first optical element having a higher refractive index to a second optical element having a lower refractive index is achieved through the use of two optical star couplers coupled to each other through a plurality of optical paths embedded in a planar waveguide. The beam from the high refractive index element is introduced into a high numerical aperture (NA) star coupler, which directs the beam through a plurality of optical paths to a second star coupler with a lower numerical aperture than the first star coupler so that its output spot-size is larger. The output port of the second star coupler is interfaced to the lower refractive index element. Wavelength tunability can be provided by including phase shifters in the paths between the two star couplers to alter the effective optical lengths of the paths to selectively produce the desired phase interference pattern.
公开日期	2005-02-17
申请日期	2003-08-15
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/53107]
专题	半导体激光器专利数据库
作者单位	LUCENT TECHNOLOGIES INC.
推荐引用方式 GB/T 7714	DOERR, CHRISTOPHER RICHARD,STULZ, LAWRENCE WARREN. Method and apparatus for mode conversion in a tunable laser. US20050036739A1. 2005-02-17.

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