Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 15

Consider graded-index fibers having index profiles = 2.0, cladding refractive indices n 2 = 1.50, and index differences = 0.01. Using Eq. (3.7), plot the ratio M eff / M for bend radii less than 10 cm at = 1 m for fibers having core radii of 4, 25, and 100 m.