Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 2

Compare the maximum theoretical power conversion efficiency (PCE) for 980-nm and 1475-nm pumping in an EDFA for a 1545-nm signal. Contrast this with actual measured results of PCE = 50.0 percent and 75.6 percent for 980-nm and 1475-nm pumping, respectively.
( b ) Using the actual results for PCE given in ( a ), plot the maximum signal output power as a function of pump power for 0 P p ,in 200 mW for pump wavelengths of 980 nm and 1475 nm.