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A study of random phased laser spots

Published online by Cambridge University Press:  09 March 2009

T. Ceccotti,
S. Bastiani,
S. Bastiani,
A. Giulietti,
V. Biancalana,
P. Chessa,
D. Giulietti and
C. Danson
T. Ceccotti
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino 7, 56127 Pisa, Italia
S. Bastiani
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino 7, 56127 Pisa, Italia
A. Giulietti
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino 7, 56127 Pisa, Italia
V. Biancalana
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino 7, 56127 Pisa, Italia
P. Chessa
Affiliation:
Istituto di Fisica Atomica e Molecolare, Via del Giardino 7, 56127 Pisa, Italia
D. Giulietti
Affiliation:
Dipartimento di Fisica, Università di Pisa, Piazza Torricelli 2, Pisa, Italia
C. Danson
Affiliation:
Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, United Kingdom
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Abstract

Far-field images produced using different random phase plates on a pulsed laser beam focused with variousf/numbers were recorded by a charge-coupled device (CCD) camera and then analyzed. Envelope spot sizes agree with diffraction theory while mean sizes of the pattern structures have been found to be larger than the diffraction limit. The probability density distribution of intensity in the focal plane is not the expected exponential. A central symmetry of the pattern has also been seen after suitably aperturing the beam. Some consequences for the use of powerful RPP-treated laser beams in laser-plasma interactions are discussed.

Information

Type
Research Article
Information
Laser and Particle Beams , Volume 13 , Issue 4 , December 1995, pp. 469 - 480
Copyright
Copyright © Cambridge University Press 1995

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References

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