Ultra-low-noise optoelectronic oscillator at 10 GHz based on a short fiber delay

We report on an optoelectronic oscillator (OEO) at 10 GHz based on a single 1 km long fiber delay, and exhibiting simultaneously an ultra-low close-in phase noise (−94 dBc/Hz @100 Hz) and a low spurious level (below −110 dBc/Hz). These results are well predicted by a model taking into account the frequency and intensity noise from the laser source that are converted into phase noise.