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Second harmonic generation in underdense plasma

Published online by Cambridge University Press:  09 March 2009

D. Giulietti
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
G. P. Banfi
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
I. Deha
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
A. Giulietti
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
M. Lucchesi
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
L. Nocera
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy
Chen Ze Zun
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino, 7 56100 Pisa, Italy

Abstract

Experimental data are reported on second harmonic generation (SHG) during the interaction between a Nd laser beam (20 ns pulse-duration and peak intensity 1013 W/cm2) and a plasma of density 1019 cm−3 produced in helium. The behavior of self-focusing and the onset of steep plasma gradients under the same experimental conditions have been previously characterized by independent techniques as already reported. In the light of these former findings, the observed SH magnitude, emission pattern and time dependence are briefly discussed and compared with expectations.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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