Hybrid optical and electronic laser locking using spectral hole burning

TL;DR

This paper presents a hybrid optical-electronic laser locking technique using spectral hole burning in cryogenic Tm:YAG, achieving ultra-low phase noise suitable for quantum optics and sensing.

Contribution

It introduces a novel hybrid stabilization method combining optical and electronic feedback to spectral holes, enhancing laser linewidth and phase noise performance.

Findings

Laser exhibits very low phase noise.

Beat signal spectrum is Fourier limited or noise floor limited.

Suitable for quantum optics and sensing applications.

Abstract

We report on a narrow linewidth laser diode system that is stabilized using both optical and electronic feedback to a spectral hole in cryogenic Tm:YAG. The laser system exhibits very low phase noise. The spectrum of the beat signal between two lasers, over millisecond timescales, is either Fourier limited or limited by the -111dBc/Hz noise floor. The resulting laser is well suited to quantum optics and sensing applications involving rare earth ion dopants.