Gain analysis of hybrid optical amplifier for 100 channels DWDM system at bit rate of 10 Gbps

Hybrid amplification based on Raman-EDFA optical amplifier in combination with Semiconductor optical amplifier (SOA) booster can be effectively used to overwhelm the design issues of optical transmission system such as bandwidth enhancement, high capacity and high speed networks. In this paper an experimental analysis based on performance of Raman-EDFA hybrid amplifiers has been carried out for 100 channels DWDM transmission system. The channels with transmission data rate of 10 Gbps were analyzed at reduced channel spacing of 0.4 nm and 0.2 nm. The performance analysis for the described systems was carried out in presence and absence of SOA based booster amplifier with an objective to study if SOA´s can be faithfully integrated with hybrid amplifiers to support DWDM systems for channel spacing as low as 0.2 nm. The result analysis of system performance showcased that with booster amplifier, channel transmission rate and spacing of 10 Gbps and 0.2 nm respectively, an approximately flat gain of 25 dB along with transmission distance up to 200 km can be successfully achieved. However in absence of booster amplifier peak gain was approximately 21 dB with relatively no signs of gain flatness over same transmission range.