Published Paper Details:

Amplification through Hybrid optical amplifiers (HOAs) is a promising and competent technology for pacy and high capacity DWDM (Dense wavelength-division-multiplexing) systems. Hybrid optical amplifiers are proposed to get better reach as well as to achieve wide gain bandwidth. In this work, diverse arrangements of amplifiers such as EDFA, SOA and RAMAN are considered for amplification in an ultra dense WDM system with channel spacings of 25 GHz. Investigation has been done for 16, 32 channels and performance is evaluated in terms of output power, Q-factor, and BER. Frequency spacing is 25 GHz to provide greater bandwidth efficiency and scrutinized its effect on FWM (Four wave mixing) in three different cases such as EDFA-EDFA, Raman-EDFA and SOA-EDFA. It is perceived that effect of FWM is greater on the SOA-EDFA arrangement and less on the Raman-EDFA. It is evident from the results that RAMAN-EDFA is best for the distance from 20 Km to 140 Km and SOA-EDFA exhibits best performance for distance of 150 Km to 200 Km. For large distances such as more than 200 Km, erbium doped amplifier-erbium doped amplifier (EDFA-EDFA) is optimal HOA Moreover, analysis of different modulations formats such as non-return to zero (NRZ) and return to zero (RZ) also has been done.