Performance Analysis of Optical Amplifier and Its Hybrid Configuration

Abstract

Optical fiber communication has become backbone of today data communication networks. Fiber communication allows multiple signals to be sent on same fiber simultaneously. Still the demand for the high data rate application is still increasing which can only be met by fiber communication because of its enormous bandwidth. Like other transmission media it also suffers from losses along the transmission. Losses like attenuation, distortion and other due to nonlinearities limit the data rate as well as transmission rate. So a device is required which can amplify the signal so that it can travel long distance. This device should be able to regenerate as well reshape the signal. This gives development of optical amplifier. These amplifiers were transparent to data rate and modulation formats. So their invention brought a revolution in the optical communication. Data rate up to 1Tb/s is possible in optical system. Further their combination known as hybrid amplifier also developed which utilizes the advantage and weakness of each other. So with the event of optical amplifier it becomes possible to transmit wdm signal. So it becomes possible to send large no of signal simultaneously with good quality of communication. So optical amplifier has been the major factor behind the success of optical communication. In this dissertation we have investigated the performance of 96 channels at 10 Gb/s using different optical amplifier and their hybrid combinations. Their performance has been evaluated on the basis of quality factor, bit error rate, eye opening and eye closure. At first we investigate the three amplifier and found that EDFA provide highest power and quality factor of as compared to other two amplifier. After 100 km SOA performs better than other two. Further we investigated the performance of hybrid amplifier for the same set up. We found that Raman- EDFA provide highest output power. At distance up to 100 km EDFA-EDFA performs good but after that Raman-Soa outperforms all other in term of quality factor, bit error rate, eye opening and closure. In the last section of the dissertation, we investigated different type of fiber like SMF, Ds-Anomalous, and Ds- Normal for Raman–EDFA amplifier. From the simulation works we find that Ds-Anomalous perform much better than the other fiber. Single mode fiber gives worst performance in terms of quality factor, eye opening and bit error rate.