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arXiv · 2307.13406

Near-infrared dual-comb spectroscopy of CO2 and N2O with a discretized highly nonlinear fiber

Alix Malfondet·Moise Deroh·Sidi-Ely Ahmedou·Alexandre Parriaux·Kamal Hammani·Romain Dauliat·Laurent Labonté·Sébastien Tanzilli·Jean-Christophe Delagnes·Philippe Roy·Raphaël Jamier·Guy Millot
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Abstract

In this paper, we introduce an all-fibered dual-comb spectrometer based on a new design of highly nonlinear fiber to efficiently convert frequency combs from 1.55 micron to 2 micron We show that our spectrometer can be used to measure absorption profiles of rovibrational transitions of CO2 and N2O molecules, and especially their collisional self-broadening coefficients. The results show very good agreement with the HITRAN database and thus further measurements have been performed on a mixture CO2 /N2O to measure the broadening of the CO2 absorption lines resulting from the presence of N2O.

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Alix Malfondet, Moise Deroh, Sidi-Ely Ahmedou, Alexandre Parriaux, Kamal Hammani, Romain Dauliat, Laurent Labonté, Sébastien Tanzilli, Jean-Christophe Delagnes, Philippe Roy, Raphaël Jamier, Guy Millot. 2023-07-25. Near-infrared dual-comb spectroscopy of CO2 and N2O with a discretized highly nonlinear fiber. https://doi.org/10.1021/acsphotonics.3c01625

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