Nonlinear propagation effects in antiresonant high-index inclusion photonic crystal fibers.
We experimentally and numerically investigate femtosecond-pulse propagation in a microstructured optical fiber consisting of a silica core surrounded by airholes that are filled with a high-index fluid. This fiber combines the resonant properties of hollow-core bandgap fibers and the high nonlinearity of index-guiding waveguides. A range of nonlinear optical effects can be observed, including soliton propagation, dispersive wave generation, and a Raman self-frequency shift. Tuning the center wavelength of the laser and varying the refractive index of the fluid lead to different propagation effects, mediated by the strongly wavelength-dependent group-velocity dispersion in these photonic bandgap confining structures.
Fuerbach
A
A
Centre for Ultrahigh-bandwidth Devices for Optical Systems, School of Physics, University of Sydney, Sydney, NSW 2006, Australia.
Steinvurzel
P
P
Bolger
J A
JA
Nulsen
A
A
Eggleton
B J
BJ