US 7,321,461 B2
Broadband light source suitable for pump module for Raman amplification and Raman amplifier using same
Motoki Kakui, Kanagawa (Japan)
Assigned to Sumitomo Electric Industries, Ltd., Osaka (Japan)
Filed on Nov. 04, 2003, as Appl. No. 10/699,846.
Claims priority of application No. 2002-332432 (JP), filed on Nov. 15, 2002.
Prior Publication US 2004/0095635 A1, May 20, 2004
Int. Cl. H01S 3/00 (2006.01)
U.S. Cl. 359—334  [359/341.33] 8 Claims
OG exemplary drawing
 
1. A Raman amplification pump module for outputting pump light for Raman-amplification of signal light propagating through an optical waveguide path, said module comprising:
a light source system for emitting light having two or more different output peak wavelengths; and
a nonlinear medium having an input port and an output port, wherein
said light source system comprises two or more light sources for emitting light having different wavelengths and an optical multiplexer for multiplexing light from said light sources and outputting the multiplexed light,
said nonlinear medium affording nonlinear effect on light emitted from said light source system and input from the input port, and outputting the resultant light as pump light from the output port, and
at least one of said light sources being a high-output laser for outputting power capable of causing optical parametric effect.