Search for stable propagation of intense femtosecond laser pulses in gas

Year: 2007

Authors: Giulietti A., Galimberti M., Gamucci A., Giulietti D., Gizzi LA., Koester P., Labate L., Tomassini P., Ceccotti T., D’Oliveira P., Auguste T., Monot P., Martin P.

Autors Affiliation: IPCF CNR, Intense Laser Irradiat Lab, Pisa, Italy;
CEA, DSM, DRECAM, SPAM, Gif Sur Yvette, France;
Univ Pisa, Dept Phys, I-56100 Pisa, Italy

Abstract: We report and discuss experimental results on the propagation of CPA pulses of moderately relativistic intensity in gas: they evidence the effects of the precursor pedestals of the main pulse. Details of great interest were observed for the first time with high quality femtosecond 90-degree interferometry. The interferometric data are also correlated with imaging and spectroscopy data of laser pulse transmitted through the gas. The most relevant physical features are confirmed by a numerical code which simulates the laser pulse propagation self-consistently with the ionization of the gas. We found that in this reginie, the propagation of the intense femtosecond pulse is basically stable apart from very weak refractive effects. In order to allow propagation at fixed intensity along an optical path larger than the Rayleigh range, we performed a first successful attempt at producing hollow plasma channels able to guide the pulse.


Volume: 25 (4)      Pages from: 513  to: 521

KeyWords: laser plasma; laser pulse propagation; Ultra intense laser
DOI: 10.1017/S0263034607000079

Citations: 9
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