Femtosecond nonlinear fiber optics in the ionization regime

Philipp Hölzer, W. Chang, J. C. Travers, A. Nazarkin, J. Nold, N. Y. Joly, Mohammed Fathy Saleh, F. Biancalana, P. St. J. Russell

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181 Citations (Scopus)


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 languageEnglish
Article number203901
Number of pages5
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 11 Nov 2011


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