Performance evaluation and comparison of hybrid and conventional optical amplifiers in DWDM system at narrow channel spacing using various modulation formats

The 160 channels, C + L band DWDM with proposed Hybrid Optical Amplifiers (HOA): the Raman-EDFA, Raman-EDFA-Raman, Raman-SOA and Raman-SOA-Raman is evaluated. It is observed that the offered Raman-EDFA provides best results in terms of Q-factor (>21 dB), wider eye opening and acceptable high output power (10 dBm). Raman-EDFA reportedly performs well even in a 160-channel system at reduced channel spacing (<0.15 nm, Q-factor = 15 dB). To draw the performance comparison, various Conventional Optical Amplifiers (COA) are also implemented on the system. Further it is observed that both Hybrid and Conventional amplifier provides acceptable results with NRZ modulation format in the present scenario.