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Helical filaments
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DOI：10.1063/1.4886960.png)
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Abstract
En 中文
The shaping of laser-induced filamenting plasma channels into helical structures by guiding the process with a non-diffracting beam is demonstrated. This was achieved using a Bessel beam superposition to control the phase of an ultrafast laser beam possessing intensities sufficient to induce Kerr effect driven non-linear self-focusing. Several experimental methods were used to characterize the resulting beams and confirm the observed structures are laser air filaments. (C) 2014 AIP Publishing LLC.
Keywords:
FEMTOSECOND LASER-PULSES
PLASMA CHANNELS
BESSEL BEAMS
AIR
GENERATION
DIFFRACTION
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