Abstract
By using a gas-filled kagome-style photonic crystal fiber, nonlinear fiber optics is studied in the regime of optically induced ionization. The fiber offers low anomalous dispersion over a broad bandwidth and low loss. Sequences of blueshifted pulses are emitted when 65 fs, few-microjoule pulses, corresponding to high-order solitons, are launched into the fiber and undergo self-compression. The experimental results are confirmed by numerical simulations which suggest that free-electron densities of are achieved at peak intensities of over length scales of several centimeters.
- Received 27 June 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.203901
© 2011 American Physical Society