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Space-time structure of the light reflected in an experiment on solid matter irradiation by laser light

Published online by Cambridge University Press:  09 March 2009

A. Caruso  and
C. Strangio
A. Caruso
Affiliation:
Associazione EURATOM-ENEA sulla fusione, C. R. E. Frascati, C. P. 65-00044 Frascati, Rome (Italy)
C. Strangio
Affiliation:
Associazione EURATOM-ENEA sulla fusione, C. R. E. Frascati, C. P. 65-00044 Frascati, Rome (Italy)
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Abstract

A study of the space-time structure of the light reflected when a plastic target (CH)n is irradiated at a maximum power of 1012 watt/cm2 by a Nd glass laser pulse of nanosecond duration is described. The reflected light has been used for time integrated spot imaging, whereas the time dependence of the reflected power at different angles has been studied by optical guides of different length coupled with a single fast photodiode. It has been found that: 1) the spot images are formed by a high contrast stationary speckle pattern, indicating the presence of a random phase mixing in the back-scattered light; 2) the interaction is characterized by a high reflection in the initial stages (t ≤ 0·3 ns) followed by almost complete absorption.

Type
Research Article
Information
Laser and Particle Beams , Volume 4 , Issue 3-4 , August 1986 , pp. 499 - 506
Copyright
Copyright © Cambridge University Press 1986

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References

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