Ultra-low phase noise all-optical microwave generation setup based on commercial devices

摘要

In this paper, we present a very simple design based on commercial devicesfor the all-optical generation of ultra-low phase noise microwave signals. Acommercial, fibered femtosecond laser is locked to a laser that is stabilizedto a commercial ULE Fabry-Perot cavity. The 10 GHz microwave signal extractedfrom the femtosecond laser output exhibits a single sideband phase noise$\mathcal{L}(f)=-104 \ \mathrm{dBc}/\mathrm{Hz}$ at 1 Hz Fourier frequency, atthe level of the best value obtained with such "microwave photonics" laboratoryexperiments \cite{Fortier2011}. Close-to-the-carrier ultra-low phase noisemicrowave signals will now be available in laboratories outside the frequencymetrology field, opening up new possibilities in various domains.