Dispersion Compensation Using FBG and DCF in 120 Gbps WDM System

514 Abstract—Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG) are widely used dispersion compensation techniques for optical communication systems. An 8 channel optical network is modelled, simulated and analysed for 120 km distance using two chromatic dispersion compensators, i.e., Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG). Three compensation techniques (pre, post and mix) are modelled for DCF and two compensation techniques (pre and post) are modelled for FBG. Non Return to Zero (NRZ) modulation format is used in transmitter. The input laser power is varied from 0 to 9 dBmto see its effect on Q-factor. The simulation results such as Q-factor and Bit Error Rate (BER) indicate that FBG when used in post compensation is better than all other compensating schemes.

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