Hi Karan ahuja
Here i would like to share advantage and disadvantage of EDFA:
High power transfer efficiency from pump to signal power (> 50%) , Wide spectral band amplification with relative flat gain (>20 dB) – useful for WDM applications, Saturation output > 1 mW (10 to 25 dBm) , Gain-time constant long (>100 msec) to overcome patterning effects and inter-modulation , distortions ( low noise) , Large dynamic range , Low noise figure , Polarization independent and Suitable for long-haul applications.
Disadvantages of EDFAs:
Relatively large devices (km lengths of fiber) – not easily integrated with other
devices , ASE – amplified spontaneous emission. There is always some output even with no signal input due to some excitation of ions in the fiber – spontaneous noise, Cross-talk effects and Gain saturation effects.
I hope this will help
Thanks