The effect of stimulated Brillouin scattering on the angular divergence of a laser beam in air

2017 ◽  
Keyword(s):  
Laser Beam ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Angular Divergence ◽  
Stimulated Brillouin

Effects of ion trapping on crossed-laser-beam stimulated Brillouin scattering

2004 ◽  
Vol 11 (1) ◽  
pp. 231-244 ◽  
Author(s):  
E. A. Williams ◽  
B. I. Cohen ◽  
L. Divol ◽  
M. R. Dorr ◽  
J. A. Hittinger ◽  
...  
Keyword(s):  
Laser Beam ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Ion Trapping ◽  
Stimulated Brillouin ◽  
Crossed Laser Beam

scholarly journals Study of stimulated Brillouin scattering in extended paraxial region

2012 ◽  
Vol 30 (2) ◽  
pp. 207-213 ◽  
Author(s):  
Prerana Sharma ◽  
A.K. Bhardwaj ◽  
R.P. Sharma
Keyword(s):  
Laser Beam ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Paraxial Approximation ◽  
Laser Beam Propagation ◽  
Ion Acoustic Wave ◽  
Laser Plasma Interaction ◽  
Laser Beam Profile ◽  
Axial Part ◽  
Stimulated Brillouin

AbstractThis communication presents a comparison of two cases to study the process of laser beam propagation and Stimulated Brillouin Scattering (SBS) in laser plasma interaction. These two cases are, with imposing the restriction of paraxial approximation on the laser beam and, relaxing this restriction up to a certain extent. In this work, the study done by Sharma et al. (2009) using paraxial approximation is extended by taking contribution of the off-axial rays in the laser beam profile. The spitted profile of the laser beam is obtained due to uneven focusing of the off-axial rays and its effect on localization of the ion acoustic wave (IAW) has been studied. Including the off-axial part of the laser beam semi-analytical solution of the nonlinear coupled IAW equation has been found and this is examined that off-axial part affects background densities. The nonlinear coupling between the laser beam and IAW is severely affected by modified profile of the laser beam. Further, it is investigated that the SBS is also influenced by this coupling process. Therefore, the reflectivity of SBS has been compared with and without contribution of off-axial rays. A notable change is found in the magnitude of SBS reflectivity in modified-paraxial case in comparison to the paraxial case.

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