Optical Fiber Communications 4th Edition by Gerd Keiser

تمرين 13

A2 × 2 waveguide coupler has K = 0.4 mm -1 , = 0.06 mm -1 , and = 0. How long should the coupler be to make a 3-dB power divider If that length is doubled, what fraction of the input power emerges from the second channel