Date Added: Feb 2012
Fiber Raman amplifiers are important component of wavelength division multiplexed fiber-optic communication systems. The number of pumps, determination of powers, wavelengths and pumping schemes are main design criteria to operate these amplifiers. This paper investigates the effect of counter propagating pumping in fiber Raman amplifier. Pumping options like single, two and seven counter propagating pumps are investigated and their effect on bandwidth and gain ripple and signal power conditions are explored. Modern light wave communication systems have used full gain bandwidth of Erbium Doped Fiber Amplifiers (EDFAs), and increasing capacity has resulted into the need of broader bandwidth optical amplifiers in the systems.