Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 19

Using Eq. (8.26) and assuming an excess noise factor x = 0.7, plot the chirp-induced power penalty in decibels as a function of the factor DL (product of the total dispersion and wavelength excursion) for the following parameter values (let DL range from 0 to 1.5 ns):
(1) t chirp = 0.1 ns and B = 2.5 Gb/s
(2) t chirp = 0.1 ns and B = 622 Mb/s
(3) t chirp = 0.05 ns and B = 2.5 Gb/s
(4) t chirp = 0.05 ns and B = 622 Mb/s
( b ) Find the distance limitation at 2.5 Gb/s if a 0.5-dB power penalty is allowed with D = 1.0 ps/(nm • km), t chirp = 0.05 ns, and = 0.5 nm.