title: Kerr nonlinearity and dispersion characterization of core-pumped thulium-doped fiber at 2  μm.
abstract: A nonlinear coefficient of 3.6-4.1  W-1km-1and group velocity dispersion of -20  ps2/km of a commercial core-pumped thulium-doped fiber have been evaluated using degenerate four-wave mixing at 2 μm. The anomalous dispersion behavior of the fiber has been confirmed by linear measurements with an all-fiber Mach-Zehnder interferometer (MZI). Additionally, no pump-induced dispersion changes due to excitation of Tm3+cations have been detected. These characteristics make these fibers attractive for pulsed fiber laser applications. A nonlinear-polarization rotation mode-locked laser involving nonlinear polarization evolution directly in the doped fiber is demonstrated.
authors.forename: Svyatoslav
authors.initials: S
authors.lastname: Kharitonov
authors.forename: Adrien
authors.initials: A
authors.lastname: Billat
authors.forename: Camille-Sophie
authors.initials: CS
authors.lastname: Brès