Double-Loop All-Optical Gain Optoelectronic Oscillator with Low Phase Noise and Spurs Level

In this paper, the optoelectronic oscillator module with double-loop configuration and all-optical gain is presented. The oscillator module simultaneously provides ultra-low phase noise of -142 dBc/Hz at 10 kHz offset from 10 GHz oscillation frequency and low spurs level of -91 dBc. Additionally, the close-in phase noise behavior at low offset frequencies is studied with respect to the influence of flicker noise.