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Beat note stabilization of a 10-60 GHz dual-polarization microlaser through optical down conversion
1Institut de Physique de Rennes, Universit´e de Rennes 1–CNRS UMR 6251, Campus de Beaulieu, F–35042 Rennes Cedex, France. antoine.rolland.1@univ-rennes1.fr
Abstract:
Down-conversion of a high-frequency beat note to an intermediate frequency is realized by a Mach-Zehnder intensity modulator. Optically-carried microwave signals in the 10-60 GHz range are synthesized by using a two-frequency solid-state microchip laser as a voltage-controlled oscillator inside a digital phase-locked loop. We report an in-loop relative frequency stability better than 2.5×10⁻¹¹. The principle is applicable to beat notes in the millimeter-wave range.