Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 24

Using Eq. (10.29) for the 2 × 2 coupler propagation matrix, derive the expressions for M 11 , M 12 , M 21 , and M 22 in Eq (10.35). From this, find the more general expressions for the output powers given by Eqs. (10.38) and (10.39).