Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 24

Calculate the numerical apertures of ( a ) a plastic step-index fiber having a core refractive index of n 1 = 1.60 and a cladding index of n 2 = 1.49, ( b ) a step-index fiber having a silica core (n 1 = 1.458) and a silicone resin cladding ( n 2 = 1.405).