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.
©2006 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
D. Reolon, M. Jacquot, I. Verrier, G. Brun, and C. Veillas
Opt. Express 14(1) 128-137 (2006)
Opt. Lett. 22(14) 1065-1067 (1997)
Akiko Hirai and Hirokazu Matsumoto
Opt. Lett. 28(21) 2112-2114 (2003)