PERFORMANCE STUDY OF FORWARD AND BACKWARD HYBRID OPTICAL RAMAN AMPLIFIERS

In this paper to enhancement the Raman gain, two Raman Amplifiers (RAs) are used one is forward pump Raman amplifier and the second is feedback pump Raman amplifier in cascaded form. The performance of the system is analyzed in terms of fiber type, fiber length, pump power and gain coefficient for enhancement the gain of fiber Raman amplifier. We present the performances and characteristics of RAs by utilizing a set of coupled differential equations and numerical simulations. Three types of fibers with different gain characteristics are used in our numerical simulations. So, the optimum initial values of the pump powers for a system with three pumps are recalculated and optimized again.