Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The strength...

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Autores principales: Lamperti, Marco, AlSaif, Bidoor, Gatti, Davide, Fermann, Martin, Laporta, Paolo, Farooq, Aamir, Marangoni, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778009/
https://www.ncbi.nlm.nih.gov/pubmed/29358712
http://dx.doi.org/10.1038/s41598-018-19188-2
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author Lamperti, Marco
AlSaif, Bidoor
Gatti, Davide
Fermann, Martin
Laporta, Paolo
Farooq, Aamir
Marangoni, Marco
author_facet Lamperti, Marco
AlSaif, Bidoor
Gatti, Davide
Fermann, Martin
Laporta, Paolo
Farooq, Aamir
Marangoni, Marco
author_sort Lamperti, Marco
collection PubMed
description We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The strength of the approach, in view of an accurate retrieval of line centre frequencies over a spectral range as large as 100 cm(−1), is demonstrated on the P(40), P(18) and R(31) lines of the fundamental rovibrational band of N(2)O covering the centre and edges of the P and R branches. The spectrometer has the potential to be straightforwardly extended to other spectral ranges, till 12 μm, which is the current wavelength limit for commercial cw EC-QCLs.
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spelling pubmed-57780092018-01-31 Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser Lamperti, Marco AlSaif, Bidoor Gatti, Davide Fermann, Martin Laporta, Paolo Farooq, Aamir Marangoni, Marco Sci Rep Article We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The strength of the approach, in view of an accurate retrieval of line centre frequencies over a spectral range as large as 100 cm(−1), is demonstrated on the P(40), P(18) and R(31) lines of the fundamental rovibrational band of N(2)O covering the centre and edges of the P and R branches. The spectrometer has the potential to be straightforwardly extended to other spectral ranges, till 12 μm, which is the current wavelength limit for commercial cw EC-QCLs. Nature Publishing Group UK 2018-01-22 /pmc/articles/PMC5778009/ /pubmed/29358712 http://dx.doi.org/10.1038/s41598-018-19188-2 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lamperti, Marco
AlSaif, Bidoor
Gatti, Davide
Fermann, Martin
Laporta, Paolo
Farooq, Aamir
Marangoni, Marco
Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_full Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_fullStr Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_full_unstemmed Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_short Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_sort absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778009/
https://www.ncbi.nlm.nih.gov/pubmed/29358712
http://dx.doi.org/10.1038/s41598-018-19188-2
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