Comparative analysis of self phase modulation (SPM) and cross phase modulation (CPM)

97 All Rights Reserved © 2012 IJARCSEE Abstract---Use of optical fiber communication is widely use due to its better bit rate and bandwidth and high carrier frequency with low power consumption. So, in this paper, we have analyzed non linear modulation techniques that are self phase modulation (SPM) and cross phase modulation (CPM) in an optical fiber system and discussed how these cause dispersion in input signal. These effects are simulated using OPTISYSTEM tool at a bit rate of 10Gbps and analyzed by eye pattern method with respect to bit error rate and Q factor. Simulation results of self phase modulation and cross phase modulation obtained in OPTISYSTEM tool which is made by OPTIWAVE INC. are compared with each other. Formula for bit error rate (BER) is implemented in MATLAB and its value is obtained by taking the value of Q factor from the design implemented in OPTISYSTEM and further variations in the value of BER are studied for both types of non linear effects and see that which type of modulation is better for long transmission in single mode optical fiber.