Backward supercontinuum emission from a filament generated by ultrashort laser pulses in air
- 15 April 2001
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 26 (8) , 533-535
- https://doi.org/10.1364/ol.26.000533
Abstract
Backward emission of the supercontinuum from a light filament induced by high-intensity femtosecond laser pulses propagating in air has been observed to be enhanced compared with linear Rayleigh–Mie scattering. This enhancement is interpreted as a nonlinear scattering process onto longitudinal refractive-index changes induced by the laser pulse itself. The spectral dependence of the supercontinuum angular distribution is also investigated.Keywords
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