Modeling and Performance Analysis of Parallel Cascaded Double Ring Resonator

Ring resonators are used for a wide range of applications in photonic circuits as optical filters, multiplexers and switches, delay lines, gyroscopes, etc. The design parameters have direct impact on the performance of ring resonators thus it becomes important to select optimum design. This paper presents the effect of variation in structural parameters on the performance parameters like Quality factor (Q-Factor), free spectral range (FSR), Full width half maxima (FWHM) and Finesse of Parallel cascaded double ring resonator (PCDRR). The optimum result is observed at $1\mu\mathrm{m}$ gap separation (G) between the rings. Q-Factor as high as 1471 is observed at gap separation of $1\mu\mathrm{m}$, waveguides width of $0.4\mu\mathrm{m}$ and ring radius of $2\mu\mathrm{m}$.