Abstract The behaviour of a high efficient double-pass discrete Raman amplifier with 80nm bandwidth was studied theoretically and experimentally. In this Raman amplifier, by using a one-end gilt fibre as the broadband reflector,signals and multi-pump are simultaneously reflected to propagate through the gain fibre for a second time in the opposite direction of the input. 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 new configuration have been studied by comparing with the currently existing Raman amplifier configurations. Also, the influencing factors for the gain increase have been analysed, including the pump-to-pump Raman interactions and the length of gain fibre.
Received: 21 May 2004
Revised: 15 June 2004
Accepted manuscript online:
(Resonators, cavities, amplifiers, arrays, and rings)
Fund: Project supported by the National Science Foundation of China for Distinguished Young Scholars through (Grant No 60125513).
Cite this article:
Wang Zhu-Yuan (王著元), Cui Yi-Ping (崔一平) Behaviour of a wideband double-pass discrete Raman amplifier with simultaneous reflection of signals and multi-pump 2005 Chinese Physics 14 372
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