Analysis of characteristics of vertical coupling microring resonator

By using the coupled mode theory and the transfer matrix technique, the optical transfer function is presented for analyzing the size of the waveguide, radius of the microring, free spectral range and amplitude coupling ratio of the vertical coupling microring resonator. Under the central wavelength of 1550 nm, optimization and simulation are performed when the central deviation between the ring and the channel is 0, 0.5, 1 mu m, respectively, the 3-dB bandwidth of the spectral response is about 0.21, 0.09, 0.03 nm, and the intensity of the nonresonant light is below -30, -40, -50 dB, respectively.