λ/2 fringe-spacing interferometer - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Optics Letters Année : 2009

λ/2 fringe-spacing interferometer

Résumé

The precision of interferometry is directly linked to the fringe spacing of the recorded interferogram. Whereas all interferometric devices show a fringe spacing equal to a wavelength of the laser light we present a novel scheme of a two-beam interferometer exhibiting a fringe spacing reduced by a factor of 2; the direct detection of the beat signal is replaced with the monitoring of the fluorescence of a twofold degenerate atomic system resonant with the laser. The λ/2 fringe spacing in the fluorescence signal is demonstrated with a hot sodium vapor excited by a broadband laser tuned to the D1 line. In the saturation regime, the dark fringes are expected to be extremely narrow, leading to the possibility of nanoscale displacement measurements or atom localization.
Fichier principal
Vignette du fichier
A_I_2_fringe_spacing_interferometer_2009.pdf (319.53 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00951774 , version 1 (27-02-2014)

Identifiants

Citer

H. Guillet De Chatellus, J. P. Pique. λ/2 fringe-spacing interferometer. Optics Letters, 2009, 34, pp.755. ⟨10.1364/OL.34.000755⟩. ⟨hal-00951774⟩

Collections

UGA CNRS LIPHY
81 Consultations
383 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More