Raman amplification pumping module, Raman amplifier, and optical communication system
AssigneeSumitomo Electric Industries, Ltd.
InventorsTetsufumi Tsuzaki, Motoki Kakui, Masayuki Nishimura
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Abstract
The present invention provides a Raman amplification pumping module and others with a structure for effectively suppressing degradation of quality of signal light even with a breakdown in either one of a plurality of light sources. The Raman amplification pumping module is provided with light sources for emitting respective lightwaves with center wavelengths different from each other, and each of the center wavelengths of the lightwaves from these light sources is adjusted so that a difference between two center wavelengths selected therefrom is less than 6 nm.
Claims16
A Raman amplification pumping module which outputs pumping light for Raman amplification of signal light propagating in an optical waveguide, said Raman amplification pumping module comprising:
- a pumping light generating system including a plurality of light sources for emitting respective lightwaves with center wavelengths different from each other;
- and
- a multiplexer for multiplexing the lightwaves with the mutually different center wavelengths emitted from the respective light sources to yield multiplexed lightwaves as said pumping light,
- wherein each of the center wavelengths of the lightwaves emitted from the respective light sources is adjusted so that a difference between two center wavelengths selected therefrom is less than 6 nm.
A Raman amplification pumping module which outputs pumping light for Raman amplification of signal light propagating in an optical waveguide, said Raman amplification pumping module comprising:
- a pumping light generating system including a plurality of light sources for emitting respective lightwaves with center wavelengths different from each other, wherein said plurality of light sources constitute one or more light source pairs of light sources emitting lightwaves with center wavelengths adjacent to each other;
- and
- a multiplexer for multiplexing the lightwaves with the mutually different center wavelengths emitted from the respective light sources to yield multiplexed lightwaves as said pumping light,
- wherein in each of said light source pairs, a wavelength spacing between a center wavelength of light emitted from one light source and a center wavelength of light emitted from the other light source is set less than 6 nm.
Dependencies are inferred from the claim text.