Hello Raja,
According to information about the parameters of Semiconductor Optical Amplifiers (SOA), I can recommend you to take a look at the ITU-T recommendation G.661 “Definition and test methods for the relevant generic parameters of optical amplifier devices and subsystems”. Here is the link for that: https://www.itu.int/rec/T-REC-G.661-200603-S/en. For the purpose of optical power level limitation, optical power level normalizer component is used.