Recent advances in Fabry-Perot-based refractometry utilizing gas modulation for assessment of pressure

Authors

  • M. Zelan Measurement Technology RISE Research Institutes of Sweden SE-501 15 Boras
  • I. Silander Department of Physics Umea University SE-901 87 Umea
  • C. Forssén Measurement Technology RISE Research Institutes of Sweden SE-501 15 Boras and Department of Physics Umea University SE-901 87 Umea
  • J. Zakrisson Department of Physics Umea University SE-901 87 Umea
  • O. Axner Department of Physics Umea University SE-901 87 Umea

DOI:

https://doi.org/10.21014/acta_imeko.v9i5.988

Abstract

Gas modulation refractometry (GAMOR) is a methodology that can mitigate the influence of fluctuations and drifts in Fabry-Pérot cavity–based refractometry. This paper presents a thorough description of its principles, what it enables, and its applicability. An overview of the latest results is presented, including the realization of a system based upon a cavity spacer made of Invar that allows for detection of N2 with sub-ppm precision, and a characterization procedure that allows for assessment of N2 with an accuracy at low-ppm levels.

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Published

2020-12-31

Issue

Vol. 9 No. 5 (2020): Special issue for TC3, TC5, TC16 and TC22

Section

Conference Submissions

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