효율적인 광결합을 위한 전이계수 특성

초록

we analyzed the excitation coefficients and the extinction ratio as a function of waveguide width. center to center distance, and angle of input waveguide for a directional coupler. The variation of the difference between excitaion coefficients is similar to that of the extinction ratio. Also, the smaller the difference between those is, the better the extinction ratio is. this concept will have applicaion to device using optical coupling