title: Air refractive index measurement using low-coherence interferometry.
abstract: This paper presents a theoretical analysis and an experimental verification of a direct method for a refractive index of air measurement combining low-coherence interferometry and laser interferometry. The method is based on monitoring optical path changes in a measuring arm of the Michelson interferometer caused by the different optical environment in a double-spaced glass cell. This article presents a set of experimental results in comparison with the results obtained by a couple of reference techniques and proves the ability of the designed method to measure the refractive index of air with accuracy in the order of 10-8.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Pikálek
authors.forename: Zdeněk
authors.initials: Z
authors.lastname: Buchta