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Optical measurement of the gas number density in a Fabry-Perot cavity
Umeå University, Sweden.
RISE., SP – Sveriges Tekniska Forskningsinstitut.ORCID-id: 0000-0001-9068-6031
Umeå University, Sweden.
RISE., SP – Sveriges Tekniska Forskningsinstitut.ORCID-id: 0000-0001-9309-9262
Vise andre og tillknytning
2013 (engelsk)Inngår i: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 24, nr 10, artikkel-id 105207Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An optical method for measuring the gas density by monitoring the refractive index inside a high-finesse Fabry-Perot cavity is presented. The frequency of a narrow linewidth Er:fiber laser, locked to a mode of the cavity, is measured with the help of an optical frequency comb while the gas density inside the cavity changes. A resolution of 1.4 × 10-6 mol m-3 is achieved in 3 s for nitrogen, which allows measurement of a relative gas density change of 3.4 × 10-8 at atmospheric pressure.

sted, utgiver, år, opplag, sider
Institute of Physics Publishing , 2013. Vol. 24, nr 10, artikkel-id 105207
Emneord [en]
Fabry-Perot cavity, gas density measurement, Laser refractometry, metrology, optical frequency comb, Atmospheric pressure, Cavity resonators, Density measurement (optical), Fabry-Perot interferometers, Fiber lasers, Fiber optic sensors, Gases, Measurements, Natural frequencies, Nitrogen, Optical data processing, Optical materials, Refractive index, Gas number density, Narrow-line width, Optical frequency combs, Optical measurement, Optical methods, Refractometry, Density of gases
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Identifikatorer
URN: urn:nbn:se:ri:diva-47574DOI: 10.1088/0957-0233/24/10/105207Scopus ID: 2-s2.0-84884898517OAI: oai:DiVA.org:ri-47574DiVA, id: diva2:1463523
Tilgjengelig fra: 2020-09-02 Laget: 2020-09-02 Sist oppdatert: 2024-03-25bibliografisk kontrollert

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