Hi Abhishek,
Are you suggesting that that when the overall power attenuation caused by fiber is for example 4dB, if we use in-line amplifiers with a gain of 10dB, for example, we have a better transmission of data in the sense of BER? I think if our gain is more than attenuation, then because of the amplifier’s noise figure the extra gain might even corrupt the constellation diagram. Do you agree with me?