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Frequency stable and low phase noise THz synthesis for precision spectroscopy

We present a robust approach to generate a continuously tunable, low phase noise, Hz linewidth and mHz/s stability THz emission in the 0.1 THz to 1.4 THz range. This is achieved by photomixing two commercial telecom, distributed feedback lasers locked by optical-feedback onto a single highly stable...

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Autores principales: Djevahirdjian, Léo, Lechevallier, Loïc, Martin-Drumel, Marie-Aline, Pirali, Olivier, Ducournau, Guillaume, Kassi, Rédha, Kassi, Samir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10630442/
https://www.ncbi.nlm.nih.gov/pubmed/37935704
http://dx.doi.org/10.1038/s41467-023-42905-z
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author Djevahirdjian, Léo
Lechevallier, Loïc
Martin-Drumel, Marie-Aline
Pirali, Olivier
Ducournau, Guillaume
Kassi, Rédha
Kassi, Samir
author_facet Djevahirdjian, Léo
Lechevallier, Loïc
Martin-Drumel, Marie-Aline
Pirali, Olivier
Ducournau, Guillaume
Kassi, Rédha
Kassi, Samir
author_sort Djevahirdjian, Léo
collection PubMed
description We present a robust approach to generate a continuously tunable, low phase noise, Hz linewidth and mHz/s stability THz emission in the 0.1 THz to 1.4 THz range. This is achieved by photomixing two commercial telecom, distributed feedback lasers locked by optical-feedback onto a single highly stable V-shaped optical cavity. The phase noise is evaluated up to 1.2 THz, demonstrating Hz-level linewidth. To illustrate the spectral performances and agility of the source, low pressure absorption lines of methanol and water vapors have been recorded up to 1.4 THz. In addition, the hyperfine structure of a water line at 556.9 GHz, obtained by saturation spectroscopy, is also reported, resolving spectral features displaying a full-width at half-maximum of 10 kHz. The present results unambiguously establish the performances of this source for ultra-high resolution molecular physics.
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spelling pubmed-106304422023-11-07 Frequency stable and low phase noise THz synthesis for precision spectroscopy Djevahirdjian, Léo Lechevallier, Loïc Martin-Drumel, Marie-Aline Pirali, Olivier Ducournau, Guillaume Kassi, Rédha Kassi, Samir Nat Commun Article We present a robust approach to generate a continuously tunable, low phase noise, Hz linewidth and mHz/s stability THz emission in the 0.1 THz to 1.4 THz range. This is achieved by photomixing two commercial telecom, distributed feedback lasers locked by optical-feedback onto a single highly stable V-shaped optical cavity. The phase noise is evaluated up to 1.2 THz, demonstrating Hz-level linewidth. To illustrate the spectral performances and agility of the source, low pressure absorption lines of methanol and water vapors have been recorded up to 1.4 THz. In addition, the hyperfine structure of a water line at 556.9 GHz, obtained by saturation spectroscopy, is also reported, resolving spectral features displaying a full-width at half-maximum of 10 kHz. The present results unambiguously establish the performances of this source for ultra-high resolution molecular physics. Nature Publishing Group UK 2023-11-07 /pmc/articles/PMC10630442/ /pubmed/37935704 http://dx.doi.org/10.1038/s41467-023-42905-z Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Djevahirdjian, Léo
Lechevallier, Loïc
Martin-Drumel, Marie-Aline
Pirali, Olivier
Ducournau, Guillaume
Kassi, Rédha
Kassi, Samir
Frequency stable and low phase noise THz synthesis for precision spectroscopy
title Frequency stable and low phase noise THz synthesis for precision spectroscopy
title_full Frequency stable and low phase noise THz synthesis for precision spectroscopy
title_fullStr Frequency stable and low phase noise THz synthesis for precision spectroscopy
title_full_unstemmed Frequency stable and low phase noise THz synthesis for precision spectroscopy
title_short Frequency stable and low phase noise THz synthesis for precision spectroscopy
title_sort frequency stable and low phase noise thz synthesis for precision spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10630442/
https://www.ncbi.nlm.nih.gov/pubmed/37935704
http://dx.doi.org/10.1038/s41467-023-42905-z
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