2004/05/21 by Serguei Kalmykov, S. Kalmykov, Gennady Shvets
Engineering · Physics and Astronomy · #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Laser-induced spectroscopy and plasma #physics.optics #physics.plasm-ph
paper · pdf · doi:10.1063/1.1778743
published as Physics of Plasmas, Vol. 11, No. 10, pp. 4686-4694 (2004) · 11 pages, 3 figures; submitted to Physics of Plasmas
arxiv created 2004/05/21 · openalex publication_date 2004/09/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Stimulated Raman backscattering (RBS) of intense laser radiation confined by a single-mode plasma channel with a radial variation of plasma frequency greater than a homogeneous-plasma RBS bandwidth is characterized by a strong transverse localization of resonantly driven electron plasma waves (EPW). The EPW localization reduces the peak growth rate of RBS and increases the amplification bandwidth. The continuum of nonbound modes of backscattered radiation shrinks the transverse field profile in a channel and increases the RBS growth rate. Solution of the initial-value problem shows that an electromagnetic pulse amplified by the RBS in the single-mode deep plasma channel has a group velocity higher than in the case of homogeneous-plasma Raman amplification. Implications to the design of a RBS pulse compressor in a plasma channel are discussed.