Design of an optical test bench (OTB) for an N-bit optical multiplier, optical convolution, and optical correlation circuit using an optical microring resonator in the Z-domain

Present paper proposes the design of an Optical Test Bench (OTB) for an N-bit optical multiplier, optical convolution, and optical correlation circuit. OTB is constructed from a silicon-based optical microring resonator (OMRR). The OTB functions as an optical 4:3 counter, 2 x 2 optical multiplier, and 2 x 2 optical partial product generator circuit. OTB has been designed to be capable of designing any order of optical multiplier, optical convolution, and optical correlation circuit. OTB has been optimized with a small ring radius of 3.546 um and a low power of 1.19 mW. The transfer function of the OTB has been developed in Z-domain. The pole-zero plot is used to validate OMRR optical switching in the frequency domain. The optical switching of the designed OTB has been validated using various critical features such as extinction ratio, contrast ratio with respect to ring radius, and coefficient of coupling to predict the circuit's correctness and feasibility. All the analyses were successfully carried out in a MATLAB environment.