Using numerical simulations, we analyze the properties of two-stage discrete fiber Raman amplifiers without and with all-optical gain clamping. In both cases a two-stage amplifier can be designed to have the same gain characteristics as a single-stage amplifier with improved noise performance by use of either the same total length of gain fiber (but with increased pump power) or total pump power (but with increased total length of gain fiber).
© 2005 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2330) Fiber optics and optical communications : Fiber optics communications
(190.5650) Nonlinear optics : Raman effect
Nikolaos Gryspolakis, Lawrence R. Chen, and Theodore Zambelis, "Performance of two-stage discrete fiber Raman amplifiers with and without all-optical gain clamping," Appl. Opt. 44, 83-90 (2005)