A new method to design optimal pump scheme for broadband flat-gain multi-wavelength pumped Raman fiber amplifier

This paper develops a novel simple method to design the multi-wavelength pumped fiber Raman amplifier with optimal gain-flatness performance, which can give the result of input pump distribution (/spl lambda//sub i/, P/sub i/) at the condition of giving the limitation of gain ripple, signal bandwidth and the number pump.