Self-focusing of Gaussian laser beam in collisionless plasma and its effect on stimulated Raman scattering process

Optik ◽  
2013 ◽  
Vol 124 (23) ◽  
pp. 6074-6080 ◽  
Author(s):  
Arvinder Singh ◽  
Keshav Walia
Keyword(s):  
Raman Scattering ◽  
Laser Beam ◽  
Stimulated Raman Scattering ◽  
Collisionless Plasma ◽  
Scattering Process ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Stimulated Raman

scholarly journals Stimulated Raman scattering of ultra intense hollow Gaussian beam in relativistic plasma

2015 ◽  
Vol 33 (3) ◽  
pp. 489-498 ◽  
Author(s):  
Prerana Sharma
Keyword(s):  
Raman Scattering ◽  
Laser Beam ◽  
Gaussian Beam ◽  
Plasma Wave ◽  
Stimulated Raman Scattering ◽  
Collisionless Plasma ◽  
Vital Role ◽  
Higher Order ◽  
Gaussian Laser Beam ◽  
Stimulated Raman

AbstractEffect of relativistic nonlinearity on stimulated Raman scattering (SRS) of laser beam propagating carrying null intensity in center [hollow Gaussian beam (HGB)] is studied in collisionless plasma. The construction of the equations is done employing the fluid theory which is developed with partial differential equation and Maxwell's equations. The phenomenon of SRS is shown along with the excitation of seed plasma wave considering relativistic nonlinearity. The power of plasma wave is observed for higher order of HGB. The Raman back reflectivity is studied numerically for various orders of hollow Gaussian laser beam (HGLB) and the numerical analysis shows that these parameters play vital role on reflectivity characteristics. It is observed that the Raman back reflectivity is less for the higher order of HGLB.

scholarly journals Stimulated Raman backscattering of filamented hollow Gaussian beams

2013 ◽  
Vol 31 (3) ◽  
pp. 387-394 ◽  
Author(s):  
Ram Kishor Singh ◽  
R.P. Sharma
Keyword(s):  
Raman Scattering ◽  
Gaussian Beam ◽  
Plasma Wave ◽  
Stimulated Raman Scattering ◽  
Collisionless Plasma ◽  
Electron Plasma ◽  
Electron Plasma Wave ◽  
Self Focusing ◽  
Paraxial Ray ◽  
Stimulated Raman

AbstractThis paper presents a model for excitation of electron plasma wave and resulting stimulated Raman scattering due to presence of a laser beam carrying null intensity in center (hollow Gaussian beam) in a collisionless plasma. We have studied the self-focusing of the hollow Gaussian beam and its effect on back stimulated Raman scattering process in the presence of ponderomotive nonlinearity. To understand the nature of propagation of the hollow Gaussian beam, electron plasma wave and back reflectivity, a paraxial-ray approximation has been invoked. It is predicted that self-focusing and back reflectivity reduces for higher order of hollow Gaussian beam.

Stimulated Raman scattering of relativistic laser beam in plasmas

2005 ◽  
Vol 12 (4) ◽  
pp. 042302 ◽  
Author(s):  
H. A. Salih ◽  
S. T. Mahmoud ◽  
R. P. Sharma ◽  
M. Rafat
Keyword(s):  
Raman Scattering ◽  
Laser Beam ◽  
Stimulated Raman Scattering ◽  
Stimulated Raman
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