Abstract
This paper proposes a tunable optoelectronic oscillator (OEO) by using a silicon nitride high-Q microring resonator (MRR) with a Q value of 4.36 × 105. Inserting the high-Q MRR into a phase-modulated link, an 8–38 GHz tunable microwave photonic filter (MPF) is realized with a 3-dB bandwidth of ∼610 MHz. Based on the tunable MPF, a tunable OEO is established. The frequency range of the OEO is 14.60 to 25.65 GHz, and the measured phase noise of the 25.65-GHz oscillation signal is -88 dBc/Hz@10 kHz.
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