We describe a simple scheme, which we call the Raman smart pump, to allow for the achievement of flat gain over broad bands with backward-pumped Raman amplification. The proposed method, based on time-division multiplexing, also removes all interaction among the various pump wavelengths and allows for dynamic gain control through simple electronic means.
© 2002 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4230) Fiber optics and optical communications : Multiplexing
(060.4510) Fiber optics and optical communications : Optical communications
(140.5560) Lasers and laser optics : Pumping
L. F. Mollenauer, A. R. Grant, and P. V. Mamyshev, "Time-division multiplexing of pump wavelengths to achieve ultrabroadband, flat, backward-pumped Raman gain," Opt. Lett. 27, 592-594 (2002)