2023 CCM & IMEKO TC16 7th International Conference on Pressure and Vacuum Metrology, Washington, DC, 15-19, May, 2023, USA
Freie Schlagworte
QuantumPascal ; pressure ; density ; refractometry ; Fabry-Perot cavity
Zusammenfassung
From basics of Fabry-Perot (FP) resonator and roundtrip phase, a complete working equation for a FP cavity based optical pressure standard (OPS) is derived and presented which includes corrections of reflection phase-shift, diffraction and pressure-induced
distortion. The correction from diffraction, i.e. Gouy phase, is negligible. To operate an OPS as a primary standard, two unknown parameters, i.e. mirror dispersion coefficient ππΆ and pressure distortion coefficient π π , in the working equation should be
determined independently. Methods to determine ππΆ and π π are described and applied to an OPS developed at the National Institute of Metrology (NIM), China. Thermodynamic effect observed in the determination of π π is also discussed.
Kostenfreier Zugang
Freier Zugang
Themenbereich der Metrologie
Masse und abgeleitete GrΓΆΓen
Innovationscluster
Quantentechnologie
GeschΓ€ftsfelder
Grundlagen der Metrologie
Zitierung
Yang, Y., Egan, P., & Rubin, T. (2023). Working equation for a Fabry-Perot cavity based optical pressure standard. 2023 CCM & IMEKO TC16 7th International Conference on Pressure and Vacuum Metrology, Washington, DC, 15-19, May, 2023, USA.
