What can be the possible reason of increase in Q factor even though there is significant increase in the fiber non linearities causing FWM at low as well as high powers,in both presence and absence of EDFA.
How to quantify the performance of FWM in the optical transmission system because as non-linearities increase or as input power is also increasing , the FWM components are clearly getting enhanced and are clearly visible in the spectrum along with the original channels.However, Q is not deteriorating, but improving.
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