Self-focusing of cosh-Gaussian laser beam in collisional plasma: effect of nonlinear absorption

2021 ◽  
Author(s):  
Naveen Gupta ◽  
Sandeep Kumar ◽  
A Gnaneshwaran ◽  
Sanjeev Kumar ◽  
Suman Choudhry
Keyword(s):  
Laser Beam ◽  
Nonlinear Absorption ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Plasma Effect

Impact of linear absorption on self-focusing of Gaussian laser beam in collisional plasma

2012 ◽  
Vol 50 (9) ◽  
pp. 1316-1320 ◽  
Author(s):  
S.T. Navare ◽  
M.V. Takale ◽  
S.D. Patil ◽  
V.J. Fulari ◽  
M.B. Dongare
Keyword(s):  
Laser Beam ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Linear Absorption ◽  
Self Focusing

Exponential density transition based self-focusing of Gaussian laser beam in collisional plasma

Optik ◽  
2018 ◽  
Vol 158 ◽  
pp. 1034-1039 ◽  
Author(s):  
A.T. Valkunde ◽  
S.D. Patil ◽  
M.V. Takale ◽  
B.D. Vhanmore ◽  
T.U. Urunkar ◽  
...  
Keyword(s):  
Laser Beam ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Exponential Density

Ponderomotive self-focusing of Gaussian laser beam in warm collisional plasma

2014 ◽  
Vol 21 (6) ◽  
pp. 063107 ◽  
Author(s):  
M. R. Jafari Milani ◽  
A. R. Niknam ◽  
A. H. Farahbod
Keyword(s):  
Laser Beam ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Self Focusing

Analytical investigation on domain of decentered parameter for self-focusing of Hermite-cosh-Gaussian laser beam in collisional plasma

2018 ◽  
Vol 25 (3) ◽  
pp. 033103 ◽  
Author(s):  
Amol T. Valkunde ◽  
Sandip D. Patil ◽  
Bandopant D. Vhanmore ◽  
Trupti U. Urunkar ◽  
Kusum M. Gavade ◽  
...  
Keyword(s):  
Laser Beam ◽  
Analytical Investigation ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Self Focusing

EFFECT OF SELF-FOCUSING ON STIMULATED RAMAN SCATTERING BY A GAUSSIAN LASER BEAM IN COLLISIONAL PLASMA: MOMENT THEORY APPROACH

2013 ◽  
Vol 22 (03) ◽  
pp. 1350030 ◽  
Author(s):  
KESHAV WALIA ◽  
ARVINDER SINGH
Keyword(s):  
Laser Beam ◽  
Stimulated Raman Scattering ◽  
Electron Plasma ◽  
Collisional Plasma ◽  
Theory Approach ◽  
Gaussian Laser Beam ◽  
Moment Theory ◽  
Electron Plasma Wave ◽  
Beam Electron ◽  
Self Focusing

In the present paper, the effect of self-focusing on stimulated Raman scattering (SRS) process by a Gaussian laser beam in collisional plasma is investigated. Due to non-uniform heating, collisional nonlinearity arises, which leads to redistribution of carriers. As a result of which, background plasma density profile in a direction transverse to pump beam axis is modified. This modification affects the incident laser beam, electron plasma wave and back-scattered beam. Nonlinear differential equations for the beam width parameters of the main beam, electron plasma wave, back-scattered wave have been set up by taking full nonlinear part of the dielectric constant of collisional plasma with the help of moment theory approach and are solved numerically by Runge–Kutta method. It is observed from the analysis that focusing of waves greatly enhances the SRS reflectivity.

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