Analysis of Cross-grid Microring Resonator Electro-optic Switch Array

The electro-optic switch array device with N + 1 horizontal channels, N vertical channels and 2N microrings is designed, and the transmission characteristics are analyzed. When the operation voltage is applied on the microrings in the array unit in various ways, the switching function of the corresponding horizontal channel can be realized. Taking the structure of 5 X 4 channels and 8 microrings as an example, the width and thickness of the waveguide core are chosen as 1.5 mu m, the thickness of the buffer layer between the waveguide core and electrode is set as 2.0 mu m, the thickness of the metal electrode and the coupling gap between the microring and channel are selected as 0.05 mu m and 0.1 mu m, respectively. When the switching voltage is 8 V, the insertion loss of the structure ranges between 2.79 and 4.31 dB, the crosstalk is below -20 dB, and the extinction ratio is over 12.5 dB.