Design and analysis of optical Y-splitters based on two-dimensional photonic crystal ring resonator

摘要

The power splitters are widely used in optical communication systems which are employed to distribute the input power into the output ports equally without any radiation or reflection losses. The proposed two-dimensional photonic crystal based power splitters are designed on a square lattice of circular silicon rods. In this work, 1x2, 1x3, 1x4 and 1x6 power splitters are proposed and designed. Except 1x2 splitter, the other three structures have a common diamond shaped structure of rods at the junction of the splitting region. The PBG of the devices are analyzed by the Plane Wave Expansion (PWE) method and their performance characteristics such as wavelength and transmission efficiency are evaluated using the Finite Difference Time Domain (FDTD) method. All the four designs show good performance and are able to provide considerable results.