Design and comparative performance evaluation of chirped FBG dispersion compensation with DCF technique for DWDM optical transmission systems

In this paper, we proposed an eight channels dense-wavelength-division-multiplexing (DWDM) optical transmission system using two different dispersion compensation techniques. Dispersion compensation mechanism limits the pulse broadening effects of transmitted signal in optical communication systems. To overcome pulse broadening effects, linear Chirped Fiber Bragg Grating (CFBG) and dispersion compensation fiber (DCF) schemes are modeled, analyzed and compared for investigate the performance of DWDM system. The proposed system is designed for 10Gbps using return-to-zero (RZ) modulation format with an erbium doped fiber amplifier (EDFA) over a channel length of 150 km single mode fiber (SMF) and 45 mm CFBG/30 km dispersion compensation fiber using Opti-System7.0 simulator. Performance of designed system is explore and compared in terms of eye-diagram, gain (dB), noise figure (dB), output power (dBm), output optical SNR (dB), bit error rate (BER) and Q-Factor by varying three different parameters which are channel length (km), input power (dBm) and attenuation coefficient (dB/km). It is observed that the CFBG gives the best performance as dispersion compensator for proposed DWDM long-haul transmission system.