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In the early days of optical communication, electrical regenerators were used to amplify the optical signals. These regenerators require optical to electrical and electrical to optical conversion for amplification and transmission. To overcome the limitations of electrical regenerators, two competing technologies emerged that provide amplification in optical domain. Erbium Doped Fibre Amplifier (EDFA) and Fiber Raman Amplifier (FRA) are such two technologies that do not need conversion rather they amplify and transmit the optical signal. Initially, researchers showed great interest in EDFA. The advancement in laser technology led to the interest of FRA. Raman amplification in optical fiber has found vast amplification in optical communication because of their capability to increase transmission capacity and data rate. Fiber Raman Amplifiers has been drawing a great attention in these days. In this paper, we discussed Amplified Spontaneous Emission (ASE) generated in FRA at 808nm band. In this process, a signal at 808 nm band is pumped at 788nm. The theoretical result shows that higher pump power is required to obtain the same gain while considering simulation with ASE as compared to without ASE. Furthermore, we report an additional effect of attenuation rather than amplification if there is insufficient pump power. For the conventional Single-Mode Optical Fiber (SMF) of 5km length plot of gain for different pump is obtained in the MATLAB environment. KeywordsASE, EDFA, FRA, SMF

Effect of ASE on Raman Gain in 800nm band