Conical emission from laser plasma interactions in the filamentation of powerful ultrashort laser pulses in air

We performed detailed experimental and numerical investigations of the conical emission (CE) accompanying the filamentation of powerful ultrashort laser pulses in air. It was found that the CE originates from self-phase modulation in the plasma produced by the pulse during propagation. The experimen...

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Bibliographic Details
Published in:Optics letters 1997-09, Vol.22 (17), p.1332-1334
Main Authors: Kosareva, O G, Kandidov, V P, Brodeur, A, Chien, C Y, Chin, S L
Format: Article
Language:English
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Summary:We performed detailed experimental and numerical investigations of the conical emission (CE) accompanying the filamentation of powerful ultrashort laser pulses in air. It was found that the CE originates from self-phase modulation in the plasma produced by the pulse during propagation. The experiment and the simulation agree on the essential features of the CE: The CE angle decreases with increasing wavelength and is independent of the position along the filament, and there is no CE at Stokes-shifted wavelengths.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.22.001332