期刊
OPTICS EXPRESS
卷 17, 期 19, 页码 16429-16435出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.016429
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- Deutsche Forschungsgemeinschaft [DE 1209/1-1, STE 762/7-1]
- GENCI [x2009106003]
Competing nonlinear optical effects that act on femtosecond laser pulses propagating in a self-generated light filament may give rise to a pronounced radial beam deformation, similar to the z-pinch contraction of pulsed high-current discharges. This self-generated spatial beam contraction is accompanied by a pulse break-up that can be beneficially exploited for on-axis temporal compression of the pulse. The pinching mechanism therefore explains the recently observed self-compression and the complicated spatio-temporal shapes typical for filament propagation experiments. (C) 2009 Optical Society of America
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