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Ionization-induced leaking-mode channeling of intense short laser pulses in gases

Published online by Cambridge University Press:  01 January 1999

A.M. SERGEEV ,
M. LONTANO ,
A.V. KIM ,
V.B. GILDENBURG ,
M.D. CHERNOBROVTSEVA ,
V.I. POZDNYAKOVA  and
I.A. SHERESHEVSKII
A.M. SERGEEV
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
M. LONTANO
Affiliation:
Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, EURATOM-ENEA-CNR Association, 20133 Milano, Italy
A.V. KIM
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
V.B. GILDENBURG
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
M.D. CHERNOBROVTSEVA
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
V.I. POZDNYAKOVA
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
I.A. SHERESHEVSKII
Affiliation:
Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov st., 603600 Nizhny Novgorod, Russia
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Abstract

We demonstrate that short laser pulse self-guiding over distances of many Rayleigh lengths can be achieved in the absence of any focusing nonlinearity as a result of trapping of a leaking wave in a plasma channel produced by field-induced ionization in the saturation regime. A detailed computational study of the new self-guiding effect in both cases of comparatively long laser pulses, when the traditional approximation of the slowly varying complex amplitude is valid, and of high intense ultrashort laser pulses comprising only few field cycles have been performed.

Type
Research Article
Information
Laser and Particle Beams , Volume 17 , Issue 1 , January 1999 , pp. 129 - 138
Copyright
© 1999 Cambridge University Press

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