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Computer simulation of laser-beam self-focusing in a plasma

Published online by Cambridge University Press:  01 April 1999

D. SUBBARAO ,
H. SINGH ,
R. UMA  and
S. BHASKAR
D. SUBBARAO
Affiliation:
Fusion Studies Program, Plasma Science and Technology Group, Centre for Energy Studies, Indian Institute of Technology (Delhi), New Delhi 110 016, India (dsr@ces.iitd.ernet.in)
H. SINGH
Affiliation:
Fusion Studies Program, Plasma Science and Technology Group, Centre for Energy Studies, Indian Institute of Technology (Delhi), New Delhi 110 016, India (dsr@ces.iitd.ernet.in) Present address: Computer Applications R&D Group of NIIT Ltd, New Delhi.
R. UMA
Affiliation:
Fusion Studies Program, Plasma Science and Technology Group, Centre for Energy Studies, Indian Institute of Technology (Delhi), New Delhi 110 016, India (dsr@ces.iitd.ernet.in)
S. BHASKAR
Affiliation:
Fusion Studies Program, Plasma Science and Technology Group, Centre for Energy Studies, Indian Institute of Technology (Delhi), New Delhi 110 016, India (dsr@ces.iitd.ernet.in) Motorola, Bangalore.
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Abstract

Laser-beam or soliton propagation is best modelled for fast computation using a split-step Fourier method based on an orthogonal transform technique known as the beam-propagation method. The beam-propagation split-step Fourier-transform technique in one and two dimensions for the propagation of a soliton or laser beam respectively in a nonlinear plasma and a split-step Hankel-transform-based algorithm for cylindrical-beam propagation close to circular cross-sectional symmetry and its computational implementation are discussed. Attention is particularly focused on the verification of the paraxial approximations of the soliton or the laser beam using these techniques, after a brief review of the beam-propagation method.

Type
Research Article
Information
Journal of Plasma Physics , Volume 61 , Issue 3 , April 1999 , pp. 449 - 467
Copyright
1999 Cambridge University Press

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