One of the key modules in the integrated optical code division multiple access (OCDMA) system is highly integrated, easily tuning optical en/decoder. Two-dimensional coherent optical en/decoder based on parallel-cascaded coupled micro-ring reflector is proposed. This device can enable simulaneonsly to tune the wavelength hopping of dual-ring down load end and the phase of intergrated phase shifter in the bus. According to the coupled mode theory, transfer matrix equations for this cascaded reflector are established. The radii for this dual-ring resonator are 50 μm and 48 μm, respectively. The resonant central wavelengths for each reflector are 1535, 1535.2, 1535.4, 1535.6 nm. Each reflected spectrum has a 3 dB bandwidth of 0.14 nm with a channel spacing of 17 GHz, ensuring the accuracy of the transmitted and received signals. Correspondingly, the number of possible users is 96 with autocorrelation peak sidelobe ratio (P/W) about 5 and cross-correlation peak ratio (P/C) about 7.