Broadband amplified spontaneous emission light source

Details Broadband amplified spontaneous emission light source Broadband amplified spontaneous emission light source

H - Electricity

04

B

H04B 10/17 (2006.01) H01S 3/067 (2006.01) H04J 14/00 (2006.01) G02B 6/28 (2006.01)

Patent

CA 2343091

A broadband ASE light source is provided which comprises an amplifying optical fiber doped with rare earth; a pumping light source and an output port both which are connected to one end of the amplifying optical fiber via a multiplexer ; and a reflecting or circulating member which is connected to the other end of the amplifying optical fiber, whereby the amplifying optical fiber emits ASE light containing a first and second wavelength bands through the port. Particularly, a second pumping light source may be connected to the other end of the amplifying optical fiber via another multiplexer to widen the wavelength hand to longer wavelength side. Further, using the amplifying Er-doped optical fiber with the pumping light sources having wavelength of a 980 nm band, the ASE light source can be emit a flattened broadband of 1530 to 1610 nm, combining the two wavelength bands of 1530 to 1570 nm and 1570 to 1610 nm. The input power supplied for the amplifying fiber from the second pumping light source may be less than 20% of the input power supplied for the amplifying fiber from the first pumping light source.

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