title: High resolution group refractive index measurement by broadband supercontinuum interferometry and wavelet-transform analysis.
abstract: In this paper we propose group refractive index measurement with a spectral interferometric set-up using a broadband supercontinuum generated in an air-silica Microstructured Optical Fibre (MOF) pumped with a picosecond pulsed microchip laser. This source authorizes high fringes visibility for dispersion measurements by Spectroscopic Analysis of White Light Interferograms (SAWLI). Phase calculation is assumed by a wavelet transform procedure combined with a curve fit of the recorded channelled spectrum intensity. This approach provides high resolution and absolute group refractive index measurements along one line of the sample by recording a single 2D spectral interferogram without mechanical scanning.
authors.forename: David
authors.initials: D
authors.lastname: Reolon
authors.forename: Maxime
authors.initials: M
authors.lastname: Jacquot
authors.forename: Isabelle
authors.initials: I
authors.lastname: Verrier
authors.forename: Gérald
authors.initials: G
authors.lastname: Brun
authors.forename: Colette
authors.initials: C
authors.lastname: Veillas