An Optical Temporal Differentiator Based on Microring Resonator and Optical Nonvolatile Phase-Change Material

In this paper, we propose a novel all-optical tuning temporal differentiator (DIFF) based on a programmable optical nonvolatile phase-change material Ge2Sb2Te5 (GST) and a Microring Resonator (MRR). Simulations realize 0.42-1.86 order differentiation of Gaussian optical pulse. Compared with the traditional electro-optic (EO) and thermo-optic (TO) tuning designs, our structure can effectively reduce the chip area and power consumption.