Infrared frequency combs and supercontinua for multiplex high sensitivity spectroscopy

TL;DR

This paper presents a high-brightness infrared supercontinuum source and a frequency comb for multiplex high-resolution spectroscopy in the 1.5 μm region, enabling sensitive, simultaneous measurement of absorption and dispersion across broad spectra.

Contribution

It introduces a novel infrared supercontinuum source and a frequency comb system for enhanced multiplex spectroscopy capabilities.

Findings

Successful generation of a supercontinuum in the 1.5 μm region

Demonstration of simultaneous absorption and dispersion measurements

Broad spectral coverage with high sensitivity

Abstract

An infrared high-brightness light source based on supercontinuum generation through a SF6 photonic crystal fiber seeded by a Cr^4+:YAG femtosecond oscillator is developed for high resolution multiplex spectroscopy in the 1.5 $\mu$m region. Moreover, a multiplex high resolution approach based on a Cr^4+:YAG frequency comb enables to probe large spectral domains, with simultaneous sensitive measurement of the absorption and the dispersion associated with all individual spectral features.