hi aasif bashir..
I think that maximum gain for the optical amplifier is determined by ASE threshold which depends in particular from flurescence
life time and backward light Relaigh scattering. Quntitative eveluation of the similar task have been solved repeatedly for
powerfull laser system for laser initiated nuclear reaction. Also, it will depend on the position of the amplifier as well as
the number of channels loaded into it. The most common is optical gain of 20-30 dB, but it may be reduced by increasing the input power..
Am i in the right direction…
with regards