Simultaneous modulation transfer spectroscopy on transitions of multiple atomic species for compact laser frequency reference modules

TL;DR

This paper introduces a technique for stabilizing laser frequencies on multiple atomic species simultaneously using a single setup, enabling compact and versatile frequency reference modules.

Contribution

The paper presents a novel method for simultaneous modulation transfer spectroscopy on multiple atomic species with a single optical system, enhancing compactness and versatility.

Findings

Successful simultaneous spectroscopy of potassium and rubidium transitions

Signals separated by different modulation frequencies and electronic filtering

Technique adaptable to various atomic species

Abstract

We present a technique for simultaneous laser frequency stabilization on transitions of multiple atomic species with a single optical setup. The method is based on modulation transfer spectroscopy and the signals are separated by modulating at different frequencies and electronically filtered. As a proof of concept, we demonstrate simultaneous spectroscopy of the potassium D$_1$, D$_2$ and rubidium D$_2$ transitions. The technique can easily be extended to other atomic species and allows the development of versatile and compact frequency reference modules.