Open AccessDisplacement interferometry with stabilization of wavelength in air
Author(s) -
Josef Lazar,
Miroslava Holá,
Ondřej Čı́p,
Martin Čížek,
Jan Hrabina,
Zdeněk Buchta
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.027830
Subject(s) - interferometry , optics , astronomical interferometer , refractive index , wavelength , nanometrology , displacement (psychology) , laser , position (finance) , physics , metrology , materials science , psychology , finance , economics , psychotherapist
We present a concept of suppression of the influence of variations of the refractive index of air in displacement measuring interferometry. The principle is based on referencing of wavelength of the coherent laser source in atmospheric conditions instead of traditional stabilization of the optical frequency and indirect evaluation of the refractive index of air. The key advantage is in identical beam paths of the position measuring interferometers and the interferometer used for the wavelength stabilization. Design of the optical arrangement presented here to verify the concept is suitable for real interferometric position sensing in technical practice especially where a high resolution measurement within some limited range in atmospheric conditions is needed, e.g. in nanometrology.