# Doppler-free Fourier transform spectroscopy

## TL;DR

This paper demonstrates a new broadband spectroscopy technique using two laser frequency combs to achieve sub-Doppler resolution, enabling precise two-photon excitation spectra of rubidium vapor.

## Contribution

It introduces a novel application of dual frequency combs for sub-Doppler broadband spectroscopy, enhancing spectral resolution and accuracy.

## Key findings

- Successful demonstration of sub-Doppler resolution in rubidium vapor
- Effective two-photon excitation spectra obtained with dual combs
- Potential for high-precision spectroscopic measurements

## Abstract

The feasibility of sub-Doppler broadband multi-heterodyne spectroscopy with two laser frequency combs is demonstrated with two-photon excitation spectra of the 5S-5D transitions of rubidium vapor.

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Source: https://tomesphere.com/paper/1706.02974