Open AccessEnhanced Kerr nonlinearity in sub-wavelength diameter As_2Se_3 chalcogenide fiber tapers
Author(s) -
Eric Mägi,
Libin Fu,
Hong C. Nguyen,
Michael R. E. Lamont,
DongIl Yeom,
Benjamin J. Eggleton
Publication year - 2007
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.010324
Subject(s) - supercontinuum , chalcogenide , optics , cross phase modulation , materials science , self phase modulation , kerr effect , wavelength , photonic crystal fiber , fiber , dispersion (optics) , modulation (music) , dispersion shifted fiber , nonlinear optics , zero dispersion wavelength , optical fiber , nonlinear system , phase modulation , optoelectronics , fiber optic sensor , physics , laser , phase noise , quantum mechanics , acoustics , composite material
We experimentally demonstrate enhanced Kerr nonlinear effects in highly nonlinear As(2)Se(3) chalcogenide fiber tapered down to sub-wavelength waist diameter of 1.2 mum. Based on self phase modulation measurements, we infer an enhanced nonlinearity of 68 W(-1)m(-1). This is 62,000 times larger than in standard silica singlemode fiber, owing to the 500 times larger n(2) and almost 125 times smaller effective mode area. We also consider the potential to exploit the modified dispersion in these tapers for ultra-low threshold supercontinuum generation.