Simple Laser Stabilization to the Strontium $^{88}$Sr Transition at 707 nm

TL;DR

This paper presents a simple method for stabilizing a laser at 707 nm using FM spectroscopy in a hollow cathode lamp, enabling effective laser cooling and trapping of strontium atoms, with additional polarization spectroscopy locking at 461 nm.

Contribution

It introduces a straightforward laser stabilization technique at 707 nm for strontium using FM spectroscopy in a hollow cathode lamp, facilitating atomic cooling and trapping.

Findings

Successful laser frequency stabilization at 707 nm.

Effective laser cooling and trapping of strontium atoms.

Brief demonstration of polarization spectroscopy lock at 461 nm.

Abstract

We describe frequency stabilization of a laser at 707.202 nm wavelength using FM spectroscopy in a hollow cathode lamp. The laser is stabilized to the $^{88}$Sr metastable $^3\mathrm{P}_2$ to $^3\mathrm{S}_1$ optical transition. The stabilized laser is utilized for laser-cooling and trapping of strontium atoms. We also briefly describe the performance of a polarization spectroscopy lock of our blue MOT laser at 461 nm derived simultaneously from the same hollow cathode lamp.