Open AccessDynamics of pump-induced refractive index changes in single-mode Yb-doped optical fibers
Author(s) -
Andrei A. Fotiadi,
О.Л. Антипов,
Patrice Mégret
Publication year - 2008
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.16.012658
Subject(s) - refractive index , materials science , optics , ytterbium , fiber , ion , optical fiber , excited state , dispersion (optics) , population , doping , atomic physics , optoelectronics , physics , demography , quantum mechanics , sociology , composite material
We quantify the refractive index changes (RIC) in single-mode ytterbium-doped optical fibers induced by optical pulses at 980 nm and, for the first time, report details of the effect dynamics. The RIC dynamics is shown to follow that of the population of the excited/unexcited ion states with a factor proportional to their polarizability difference (PD). The absolute PD value is evaluated in the spectral range of 1460-1620 nm for different fiber samples and is found to be independent on the fiber geometry and on the ion concentration. The PD dispersion profile indicates to a predominant far-resonance UV rather than near-resonant IR transitions contribution to the RIC.