Relativistic and ponderomotive self‐focusing of a laser beam in a radially inhomogeneous plasma. II. Beyond the paraxial approximation

1994 ◽  
Vol 1 (4) ◽  
pp. 968-989 ◽  
Author(s):  
G. Bonnaud ◽  
H. S. Brandi ◽  
C. Manus ◽  
G. Mainfray ◽  
T. Lehner
Keyword(s):  
Laser Beam ◽  
Inhomogeneous Plasma ◽  
Paraxial Approximation ◽  
Self Focusing ◽  
Radially Inhomogeneous

Steady state self-focusing, self-modulation of laser beam in an inhomogeneous plasma

Optik ◽  
2011 ◽  
Vol 122 (5) ◽  
pp. 375-380 ◽  
Author(s):  
Ravinder Kaur ◽  
Tarsem Singh Gill ◽  
Ranju Mahajan
Keyword(s):  
Steady State ◽  
Laser Beam ◽  
Inhomogeneous Plasma ◽  
Self Focusing

Self-focusing of a laser beam in an inhomogeneous plasma

1979 ◽  
Vol 21 (1) ◽  
pp. 1-12 ◽  
Author(s):  
M S Sodha ◽  
L A Patel ◽  
S C Kaushik
Keyword(s):  
Laser Beam ◽  
Inhomogeneous Plasma ◽  
Self Focusing

Relativistic self-focusing of a laser beam in an inhomogeneous plasma

2005 ◽  
Vol 72 (02) ◽  
pp. 195 ◽  
Author(s):  
MEENU VARSHNEY(ASTHANA) ◽  
K. A. QURESHI ◽  
DINESH VARSHNEY
Keyword(s):  
Laser Beam ◽  
Inhomogeneous Plasma ◽  
Self Focusing

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

Relativistic self-focusing of a rippled laser beam in a plasma

1999 ◽  
Vol 62 (4) ◽  
pp. 389-396 ◽  
Author(s):  
M. V. ASTHANA ◽  
A. GIULIETTI ◽  
DINESH VARSHNEY ◽  
M. S. SODHA
Keyword(s):  
Refractive Index ◽  
Laser Beam ◽  
The Self ◽  
Laser Beams ◽  
Radial Dependence ◽  
Main Beam ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Saturation Effects ◽  
Paraxial Ray

This paper presents an analysis of the relativistic self-focusing of a rippled Gaussian laser beam in a plasma. Considering the nonlinearity as arising owing to relativistic variation of mass, and following the WKB and paraxial-ray approximations, the phenomenon of self-focusing of rippled laser beams is studied for arbitrary magnitude of nonlinearity. Pandey et al. [Phys. Fluids82, 1221 (1990)] have shown that a small ripple on the axis of the main beam grows very rapidly with distance of propagation as compared with the self-focusing of the main beam. Based on this analogy, we have analysed relativistic self-focusing of rippled beams in plasmas. The relativistic intensities with saturation effects of nonlinearity allow the nonlinear refractive index in the paraxial regime to have a slower radial dependence, and thus the ripple extracts relatively less energy from its neighbourhood.

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