Field Analysis of 3-D Optical Waveguide Step Discontinuity by Equivalent Network of Multi-Transmission Line and Multi-Port Ideal Transformer

Exact analysis of 3-D optical waveguide step discontinuity is important for exact design of optical integrated circuit. In order to treat this problem systematically, equivalent network approach for lateral direction and waveguide direction is proposed and practically applied to strip-loaded 3-D optical waveguide step discontinuity with fruitful results.