Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 16

Two common fiberjacket materials are Elvax ® 265 ( E j = 21 MPa) and Hytrel ® 4056 ( E j; = 58 MPa), both made by DuPont. If the Young's modulus of a glass fiber is 64 GPa, plot the reduction in microbending loss as a function of the index difference when fibers are coated with these materials. Make these plots for values ranging from 0.1 to 1.0 percent and for a fiber cladding-to-core ratio of b / a = 2.