Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 2

Consider two identical single-mode opti­cal fibers that have a core refractive index n 1 = 1.48 and a mode-field radius w = 5 m
Table P5.16 at 1300 nm. Assume the material between the fiber ends is air with an index of 1.0. Using Eq. (5.43), plot the following connector losses in decibels (in each case, vary only one alignment parameter, keeping the other two mechanical misalignments fixed at zero):
( a ) Lateral offset over the range 0 d 4 m.
( b ) Longitudinal offset over the range 0 s 40 m.
( c ) Angular misalignment over the range 0 2°.