$High-precision gas refractometer by comb-mode-resolved spectral interferometry$
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High-precision gas refractometer by comb-mode-resolved spectral interferometry

Abstract High-accuracy knowledge of gas refractivity is typically crucial for optical interferometry, precise optical systems, and calculable pressure standard development. Here, we demonstrate an absolute gas refractometer by spectral interferometry and a high-resolution spectrometer. The spectral...

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Autores principales:	Lijun Yang, Yan Li, Haoyun Wei
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Spectral Interferometry Virtually Imaged Phased Array (VIPA) Comb Mode Vacuum Cell Interferometric Phase Difference Medicine R Science Q
Acceso en línea:	https://doaj.org/article/692470137d3041b1b03e414e131f6b7c
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id	oai:doaj.org-article:692470137d3041b1b03e414e131f6b7c
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spelling	oai:doaj.org-article:692470137d3041b1b03e414e131f6b7c2021-12-02T15:08:27ZHigh-precision gas refractometer by comb-mode-resolved spectral interferometry10.1038/s41598-018-34641-y2045-2322https://doaj.org/article/692470137d3041b1b03e414e131f6b7c2018-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-34641-yhttps://doaj.org/toc/2045-2322Abstract High-accuracy knowledge of gas refractivity is typically crucial for optical interferometry, precise optical systems, and calculable pressure standard development. Here, we demonstrate an absolute gas refractometer by spectral interferometry and a high-resolution spectrometer. The spectral interferometry relies on a comb with fiber Fabry–Pérot filtering cavity, and a double-spaced vacuum cell. The spectrometer employs a virtually imaged phased array, diffraction grating and near-infrared camera to fully resolve the comb modes. Finally, by means of fast-Fourier-transform, the group refractivity can be derived from the spectrally resolved interferograms of the two beams propagating in the inside and outside of the vacuum cell. To confirm the feasibility and performance of the gas refractometer, the measurement of ambient air was conducted. The proposed scheme has a combined uncertainty of 1.3 × 10−9 for air and a single measurement only takes 10 ms, which is applicable for gas refractivity monitoring and compensating in real time.Lijun YangYan LiHaoyun WeiNature PortfolioarticleSpectral InterferometryVirtually Imaged Phased Array (VIPA)Comb ModeVacuum CellInterferometric Phase DifferenceMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Spectral Interferometry Virtually Imaged Phased Array (VIPA) Comb Mode Vacuum Cell Interferometric Phase Difference Medicine R Science Q
spellingShingle	Spectral Interferometry Virtually Imaged Phased Array (VIPA) Comb Mode Vacuum Cell Interferometric Phase Difference Medicine R Science Q Lijun Yang Yan Li Haoyun Wei High-precision gas refractometer by comb-mode-resolved spectral interferometry
description	Abstract High-accuracy knowledge of gas refractivity is typically crucial for optical interferometry, precise optical systems, and calculable pressure standard development. Here, we demonstrate an absolute gas refractometer by spectral interferometry and a high-resolution spectrometer. The spectral interferometry relies on a comb with fiber Fabry–Pérot filtering cavity, and a double-spaced vacuum cell. The spectrometer employs a virtually imaged phased array, diffraction grating and near-infrared camera to fully resolve the comb modes. Finally, by means of fast-Fourier-transform, the group refractivity can be derived from the spectrally resolved interferograms of the two beams propagating in the inside and outside of the vacuum cell. To confirm the feasibility and performance of the gas refractometer, the measurement of ambient air was conducted. The proposed scheme has a combined uncertainty of 1.3 × 10−9 for air and a single measurement only takes 10 ms, which is applicable for gas refractivity monitoring and compensating in real time.
format	article
author	Lijun Yang Yan Li Haoyun Wei
author_facet	Lijun Yang Yan Li Haoyun Wei
author_sort	Lijun Yang
title	High-precision gas refractometer by comb-mode-resolved spectral interferometry
title_short	High-precision gas refractometer by comb-mode-resolved spectral interferometry
title_full	High-precision gas refractometer by comb-mode-resolved spectral interferometry
title_fullStr	High-precision gas refractometer by comb-mode-resolved spectral interferometry
title_full_unstemmed	High-precision gas refractometer by comb-mode-resolved spectral interferometry
title_sort	high-precision gas refractometer by comb-mode-resolved spectral interferometry
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/692470137d3041b1b03e414e131f6b7c
work_keys_str_mv	AT lijunyang highprecisiongasrefractometerbycombmoderesolvedspectralinterferometry AT yanli highprecisiongasrefractometerbycombmoderesolvedspectralinterferometry AT haoyunwei highprecisiongasrefractometerbycombmoderesolvedspectralinterferometry
_version_	1718388125473964032

High-precision gas refractometer by comb-mode-resolved spectral interferometry

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