Coupled micro-ring resonator based optical en/decoder for 2-D coherent OCDMA application

We propose a novel reconfigurable optical encoder/decoder for two-dimensional (2-D) coherent OCDMA application. The proposed device is based on the reflective characteristic of cascaded coupled double micro-ring resonators. The ring-ring and ring-bus coupling coefficients have been optimized to achieve a flat-top reflective spectrum by using transfer-matrix method. Numerical analysis indicates that the proposed device enables simultaneous tuning of the wavelength hopping and spectral phase encoding patterns.