Methodology for internally referenced assessment of cavity deformation in Fabry-Perot refractometry.

Authors

Johan Zakrisson, Isak Silander, Martin Zelan, Ove Axner

Published in

Optics express. Volume 34. Issue 15. Pages 27662-27679. Jul 27, 2026.

Abstract

Fabry-Pérot (FP) cavity-based refractometry enables low-uncertainty realizations of pressure; however, its accuracy is fundamentally constrained by pressure-induced cavity deformation. We report a pressure-standard-independent method for in situ characterization of cavity deformation employing two connected refractometers using the Diffusion-Isolated Pressure Equilibration (DIPE) methodology, which allows two compartments containing dissimilar gases to reach thermodynamic pressure equilibrium while preventing gas mixing. By comparing the differential responses of two refractometers when used with identical and different gases (He and Ar), where one serves as the reference for the other, the cavity deformations of both cavities are determined with high accuracy without the use of a pressure standard.

PMID:
42596425
Bibliographic data and abstract were imported from PubMed on 14 Aug 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.