# Frequency modulation Fourier transform spectroscopy

## TL;DR

The paper introduces FM-FTS, a novel spectroscopy technique that combines frequency modulation heterodyne and Fourier transform methods for broadband, sensitive absorption and dispersion measurements, demonstrated on C2H2 overtone spectra.

## Contribution

It presents a new combined spectroscopy method, FM-FTS, enabling simultaneous broadband measurement of absorption and dispersion with high sensitivity.

## Key findings

- Successful experimental demonstration on C2H2 spectrum
- Achieved broadband spectral coverage with high sensitivity
- Simultaneous measurement of absorption and dispersion profiles

## Abstract

A new method, FM-FTS, combining Frequency Modulation heterodyne laser spectroscopy and Fourier Transform Spectroscopy is presented. It provides simultaneous sensitive measurement of absorption and dispersion profiles with broadband spectral coverage capabilities. Experimental demonstration is made on the overtone spectrum of C2H2 in the 1.5 $\mu$m region.

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Source: https://tomesphere.com/paper/0704.0562