Simulation of Integrated Optical Triple Ring Resonator for Sensing Application

In this work, a compact integrated optical ring resonator was designed with three rings structure having identical radius and two bus waveguides. The four ports of the bus waveguide i.e., two input and two output ports were placed for monitoring the path of the light traveling through input port to the output port. The linking of the light was achieved by the virtue of the rings and bus waveguide that works on the coupled mode theory. The imitation of the three- ring resonator configuration was carried out to analyze the parameters like transmission spectra and the free spectral range. The variation in the intensity of the light at the output port with respect to the wavelength was monitored in the simulation results. The sensitivity of the waveguide observed was 383 nm/RIU. The phase change occurred by the light structure is presented. The designed structure can further be analyzed for the sensing application since we can observe the shift in the phase by placing any bio particle in the structure.