Open AccessDetermination of the nonlinear refractive index of multimode silica fiber with a dual-line ultra-short pulse laser source by using the induced grating autocorrelation technique
Author(s) -
Aboubakar Traore,
Elaine Lalanne,
Anthony Johnson
Publication year - 2015
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.23.017127
Subject(s) - optics , materials science , multi mode optical fiber , grating , fiber bragg grating , photonic crystal fiber , photorefractive effect , graded index fiber , laser , refractive index , optical fiber , step index profile , optoelectronics , fiber optic sensor , physics
We measured, within 6% accuracy, the nonlinear refractive index (n2) of 10 meter long multimode silica fiber of 17μm core diameter, using a modified induced grating autocorrelation technique (IGA). This measurement technique, based on time-delayed two beam coupling in a photorefractive crystal has been used to accurately measure n2 in short lengths of single mode fibers. For the first time to our knowledge, IGA is used to measure n2 of multimode fiber with a passively modelocked Nd:YVO4 laser operating with a dual-line near 1342 nm.