Study On Mode Characteristics Of Porous Micro—Ring Waveguide

With the rapid development of optical fiber communication technology,the demand of optical communication network is also increasing constantly.Micro-ring resonator is one of the important components of optical fiber communication,and its theoretical research is of great importance.Because of the small size,simple structure,easy to make,easy to integrate and so on,it is possible to prepare many optical devices by controlling the coupling between the waveguide and the micro-ring resonator,the coupling between the micro-ring and the micro-ring,Such as filters,wavelength division multiplexers,optical switches and so on.The micro-ring resonator with periodic pattern has better dispersion control and non-uniform free spectral range than traditional micro-ring resonator.In this paper,the coupling characteristics between the periodic aperture microring resonator and the straight waveguide are studied by the time domain coupled mode theory.In the hole cavity as resonant coupling waveguide(CROW)under the premise of theoretical model for two cavity coupled waveguides and micro ring resonator is firstly established,discuss the odd and even split resonator and the transmission performance,and the use of finite difference time domain method(FDTD)of the mathematical model the simulation results are consistent with the theoretical model of numerical simulation;finally,a theoretical model for three cavity coupling a waveguide and micro ring resonator,are also discussed in this structure,the resonant cavity number is odd and even when the splitting and transmission performance,FDTD simulation verified the theory research by conclusion.The results of this paper provide a theoretical reference and reference for the design of photonic devices in the field of optical information processing and optical communication.