Thz Fabry-perot Spectrometer

Hindle, Francis

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https://hdl.handle.net/2142/111314 Copy

Description

Title

Thz Fabry-perot Spectrometer

Author(s)

Hindle, Francis

Contributor(s)

• Mouret, Gaël
• Cuisset, Arnaud
• Bocquet, Robin
• Pienkina, A.
• Simon, Fabien
• Elmaleh, Coralie

Issue Date

2021-06-22

Keyword(s)

Instrument/Technique Demonstration

Abstract

The development of Cavity-Enhanced Techniques and Cavity Ring Down Spectroscopy has allowed many sensitive infrared measurements to be undertaken. We have constructed a THz resonator with a high finesse to form the basis of a new instrument for sensitive cavity enhanced THz measurements. The resonator uses a low loss oversized corrugated waveguide and high reflectivity photonic mirrors. An effective path length of one kilometer is obtained for a device that is 50 cm in length. A significant sensitivity improvement has been evaluated at 620 GHz by the measurement of minority isotopologues of OCS\footnote{Francis Hindle, Robin Bocquet, Anastasiia Pienkina, Arnaud Cuisset, and Gaël Mouret, Terahertz gas phase spectroscopy using a high finesse Fabry-Pérot cavity Optica (2019) vol 6, 1449-1454 DOI: 10.1364/OPTICA.6.001449}. The sensitivity achieved has allowed several centrifugal distortion-induced rotational lines of CF$_4$ to be recorded and its tetrahedral splitting to be resolved \footnote{Cuisset A, Hindle F, Mouret G, Bocquet R, Bruckhuisen J, Decker J, Pienkina A, Bray C, Fertein E, Boudon V. Terahertz Rotational Spectroscopy of Greenhouse Gases Using Long Interaction Path-Lengths Applied Sciences (2021) vol 11(3) p 1229. https://doi.org/10.3390/app11031229}.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111314

DOI

10.15278/isms.2021.TI04

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