A 1550nm fiber optic transmission Link if of 50km length without repeating with a signal mode fiber having loss of 0.2dB/km. The fiber is joined…

A 1550nm fiber optic transmission Link if of 50km length without repeating with a signal mode fiber having loss of 0.2dB/km. The fiber is joined ever 2km with conductor each with 0.5dB loss. Determine the minimum average power which should be lunched in to the fiver in order to Tarantion an average optical power level of 10 micro-watts at the receiver.