In the traditional micro-ring electro-optic switch structure

the function of switching in optical communication system is realized by designing different positions between micro-ring and direct waveguide. However

the switching voltage is so high that it wastes resources. Based on the coupled mode theory

electro-optic modulation theory

micro-ring resonance theory

and transfer matrix theory

a device model of nested micro-ring dual-channel electro-optic switch is proposed in this paper. We conduct a simulated analysis of this device at the resonant wavelength of 1 552 nm. The simulation results show that the device model has a very small switching voltage of only 1 V with crosstalk less than-35 dB and insertion loss less than 4 dB. The total time domain response is 5.33 ps with rise and fall time of only 0.25 ps. The structure has the characteristics of low switching voltage

short response time and large spectral bandwidth

which enhances the performance of dense wavelength division multiplexing system.