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Modulation instability of two laser beams in plasma

Published online by Cambridge University Press:  15 October 2013

Vijay Singh
Vijay Singh*
Affiliation:
Department of Physics, Galgotia College of Engineering and Technology, Greater Noida, 201306India
*
Address correspondence and reprint requests to: Vijay Singh, Department of Physics, Galgotia College of Engineering and Technology, Greater Noida, 201306India. E-mail: [email protected]
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Abstract

In the present paper, spatial amplitude modulation instability arising due to relativistic self-phase modulation and relativistic cross phase modulation of two co-propagating, linearly polarized laser beams (with arbitrary relative polarization) interacting with homogeneous plasma, has been studied. Wave equations including finite perturbation length effects, group velocity dispersion, and coupled nonlinear source term have been set up. Coupled dispersion relation for the two laser beams has been derived and solved numerically. The growth rate of modulation instability has been obtained and compared with the growth rate of a single beam propagating in homogeneous plasma. It has been shown that modulation instability of a single beam may either be enhanced or suppressed by co-propagation of another laser beam having appropriate polarization.

Keywords

Co-propagating beams in plasmaModulation instabilityRelativistic cross phase modulationRelativistic self-phase modulation
Type
Research Article
Information
Laser and Particle Beams , Volume 31 , Issue 4 , December 2013 , pp. 753 - 758
Copyright
Copyright © Cambridge University Press 2013 

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