다중모드간섭기의 위상오차 최소화 설계와 자아결상 특성의 개선

초록

Simple principle of self-imaging in multimode interference (MMI) devices is based on the approximation of propagation constants. The phase errors of each mode originated from this approximation deteriorate the quality of imaging. We proposed a design of reconciliation of the index difference between core and cladding to reduce the phase errors of each mode. Comparison of self-imaging characteristics between optimized design and other design cases with lower and higher index steps than optimized provides improvement of the imaging quality of MMI devices.