Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 1

Consider the signal-to-noise ratio expression given in Prob. 7.14a. Analogous to Fig. 7.20, plot S/N in dB [i.e., 10 1og( S / N )] as a function of the received power level P r in dBm when the dark current I D = 10 nA and x = 1.0. Let B e = 5 MHz, m = 0.8, = 0.5 A/W, T = 300 K, and R eq /F t = 10 4 . Recall that I p = P r