Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 4

A laser emitting at 0 = 850 nm has a gainspectral width of = 32 nm and a peak gain of g (0) = 50 cm 1. Plot g ( ) from Eq. 4.41. If t = 32.2 cm -1 , show the region where lasing takes place. If the laser is 400 µ m long and n = 3.6, how many modes will be excited in this laser