Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 20

An LED operating at 850 nm has a spectral width of 45 nm. What is the pulse spreading in ns/km due to material dispersion What is the pulse spreading when a laser diode having a 2-nm spectral width is used ( b ) Find the material-dispersion-induced pulse spreading at 1550 nm for an LED with a 75-nm spectral width. Use Fig. 3.13 to estimate d/d.