RF photonic interference mitigation system using silicon nitride ring resonator network

We experimentally demonstrate a novel RF interference mitigation technique using a network of low-loss silicon nitride ring resonators. The rings are used for complex (phase and amplitude) line-by-line shaping of higher-order sidebands from an electro-optic modulator to discriminate large and small RF signal input, thereby achieving strong (30 dB) mitigation of a large signal and virtually no mitigation for small signals.