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Self-Focusing of Elliptical Laser Beam in Collisional Plasma and Its Effect on Stimulated Brillouin Scattering Process

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Abstract

This paper presents an investigation of self-focusing of elliptical laser beam in a collisional plasma and its effect on stimulated Brillouin scattering (SBS) process. The non-linearity arising through non-uniform heating leads to redistribution of carriers, which modifies the background plasma density profile in a direction transverse to pump beam axis. This modification affects the incident laser beam, ion-acoustic wave and back scattered beam. Non-linear differential equations for the beam width parameters of the pump laser beam, ion-acoustic wave and back scattered beam are set up and solved numerically. It is observed from the analysis that the focusing of waves greatly enhances the SBS back-reflectivity.

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Acknowledgments

This work is supported by Department of Science and Technology (DST), Government of India.

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Authors and Affiliations

  1. Department of Physics, National Institute of Technology, Jalandhar, India

    Arvinder Singh & Keshav Walia

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  1. Arvinder Singh
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  2. Keshav Walia
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Correspondence to Arvinder Singh.

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Singh, A., Walia, K. Self-Focusing of Elliptical Laser Beam in Collisional Plasma and Its Effect on Stimulated Brillouin Scattering Process. J Fusion Energ 31, 531–537 (2012). https://doi.org/10.1007/s10894-011-9496-y

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  • DOI: https://doi.org/10.1007/s10894-011-9496-y

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