Broadband Raman amplifiers in the spectral range of 1480-1620 nm

Raman amplifiers using germano-silica fibers are demonstrated with a continuous operation bandwidth from 20 nm to more than 100 nm, 20-40 dB net gain and 4.5-7 dB noise figure. Single-, dual-, and triple-wavelength pumping are implemented in the configuration incorporating circulators for pump/signal multiplexing.