A wide-band (1530-1610 nm) and high efficient double-pass discrete Raman amplifier is reported. In this Raman amplifier, by using a one-end gilded fiber as the broadband reflector, signals and multi-pump are both reflected to propagate through the gain fiber for a second time. An increase in net gain of more than 150% has been achieved compared with that in the typical co-pumped Raman amplifier. The advantages of this proposed new configuration have been experimentally studied by comparing with the recently existing Raman amplifier configurations.
© 2005 Chinese Optics Letters
Zhuyuan Wang and Yiping Cui, "Wide-band double-pass discrete Raman amplifier with reflection of signals and pumps," Chin. Opt. Lett. 2, 480-482 (2004)