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Abstract :
There is a huge demand of bandwidth and gain in today’s high tech era. To fulfil this demand proper amplification is required. Hybrid Optical Amplifier made a remarkable change in present optical networks in order to amplify the signals for better performance of a system. In this paper, we have proposed the different configurations of hybrid optical amplifiers for better performance of Wavelength Division Multiplexed (WDM) systems. This paper also provides a crucial insight into the performance of different configurations of hybrid optical amplifiers (such as EDFA–Raman, EDFA–EDFA and SOA–EDFA) at 10 Gbps in WDM systems with 0.4 and 0.8 nm channel spacing. Work capacities of the systems were compared on the basis of various parameters viz., fiber length, dispersion, bit error rate, quality factor, eye diagram and output power. Attempts were taken to design 8 × 10 Gbps Dense Wavelength Division Multiplexed system with reduced channel spacing and 16 × 10 Gbps WDM system with 100 GHz channel spacing. It was assessed that for WDM system with 16 inputs and channel spacing of 0.8 nm, Raman–EDFA configuration gives better results as compared to EDFA–EDFA and SOA–EDFA configurations. Further, it was observed that SOA–EDFA configuration with reduced channel spacing (0.4 nm) provided maximum output power and better eye opening with lowest BER at a distance of 100 km. Moreover, it was seen that with increase in channel dispersion from 2 to 8 ps/nm/km, the quality of the signal started decreasing.