Optoelectronic phase-locked loop for millimeter-wave and THz beat note stabilization
Résumé
A novel scheme based on opto-electronic down conversion is proposed and demonstrated to obtain an ultra-high spectral purity and tunable optical beat note in the GHz and millimeter wave range. An in-loop relative frequency stability better than 4 10-12 is reported. This approach opens the way to THz metrology.