Performance Investigation and Comparison of C-band E+R+E and R+E HOAs for Ultra-dense Wavelength Division Multiplexing Systems

We analyze EYDFA + Raman + EYDFA (E+R+E) and Raman + Erbium (R+E) hybrid optical amplifiers (HOA) configurations in C-band at 1560 nm for an ultra-dense wavelength division multiplexing (UD-WDM) system. The HOA has been evaluated in terms of gain, gain ripple, noise figure (NF) and optical signal to noise ratio (OSNR) at two data rates of 10 and 100 Gb/s. HOAs have also been analyzed at different input power levels changing from 0.1 to 0.001 mW for both the data rates. The HOA high and flat gain of 65 dB with 8 dB of NF has been attained with an input power of 0.001 mW at a data rate of 10 Gbps. EYDFA + Raman + EYDFA HOA outperforms the Raman + EYDFA; as the highest gain of 64 dB achieved with a low value of gain ripple of approximately 3 dB.