Pumping light source unit, raman amplifier, and optical transmission system

   
   

The present invention relates to a pumping light source unit for Raman amplification and the like comprising a structure for improving the pumping light spectrum controllability so as to enable output signal light spectrum adjustment within an amplification wavelength band. The pumping light source unit comprises N (.gtoreq.2) pumping light sources for outputting N channels of pumping light having respective wavelengths different from each other, a multiplexer for multiplexing the N channels of pumping light, and an output structure for supplying a Raman amplification optical fiber with the pumping light outputted from the multiplexer. In particular, at least one of the N pumping light sources includes a variable length pumping light source adapted to change the channel wavelength of pumping light outputted therefrom. This configuration makes it possible to adjust pumping light spectra, thereby improving the controllability of output signal light spectra (Raman gain spectra).

A invenção atual relaciona-se a uma unidade bombeando da fonte clara para o amplification de Raman e ao gosto que compreende uma estrutura para melhorar o controllability claro bombeando do spectrum para permitir o ajuste do spectrum da luz do sinal de saída dentro de uma faixa do wavelength do amplification. A unidade bombeando da fonte clara compreende fontes claras bombeando de N (gtoreq.2) para outputting as canaletas de N da luz bombeando que tem os wavelengths respectivos diferentes de se, um multiplexer para multiplexing as canaletas de N da luz bombeando, e uma estrutura da saída para fornecer uma fibra ótica do amplification de Raman com a luz bombeando outputted do multiplexer. No detalhe, ao menos um do N que bombeia fontes claras inclui um comprimento variável que bombeia a fonte clara adaptada para mudar o wavelength da canaleta da luz bombeando outputted therefrom. Esta configuração faz possível ajustar os spectra claros bombeando, melhorando desse modo o controllability de spectra da luz do sinal de saída (spectra do ganho de Raman).

 
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