Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 21

Compare the system margins for 40-km and 80-km long-haul OC-48 (STM-16) links at 1550 nm for the minimum and maximum source output ranges. Assume there is a 1.5-dB coupling loss at each end of the link. Use Tables 13.4 and 13.5.