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 similar to 10(17) cm(-3) are achieved at peak intensities of 10(14) W/cm(2) over length scales of several centimeters.
| Original language | English |
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| Article number | 203901 |
| Number of pages | 5 |
| Journal | Physical Review Letters |
| Volume | 107 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 11 Nov 2011 |