scholarly journals Laser beam self-focusing in collisional plasma with periodical density ripple

2020 ◽  
Vol 38 (1) ◽  
pp. 45-53
Author(s):  
Geng Zhang ◽  
Xiongping Xia
Keyword(s):  
Laser Beam ◽  
Nonlinear Effect ◽  
Collisional Plasma ◽  
Plasma System ◽  
Self Focusing ◽  
Region Theory

AbstractIn the paper, we applied the paraxial region theory and Wentzel–-Kramers–-Brillouin approximation to study laser beam self-focusing in the interaction of laser and collisional plasma with periodical density ripple. The results have shown that, under the influence of collision nonlinear effect, laser presents stable self-focusing, self-defocusing, and oscillational self-focusing in the plasma. Besides, the parameters of plasma with periodical density ripple have a greater impact on the effect of self-defocusing and oscillational self-focusing than stable self-focusing. In certain conditions, beam self-defocusing and oscillational self-focusing would decline and even disappear, and stable self-focusing would further be strengthened. Hence, selecting a suitable periodic plasma system is advantageous for separating self-defocusing and oscillational self-focusing, and for the formation of a more stable collisional 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

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

scholarly journals Relativistic Gaussian laser beam self-focusing in collisional quantum plasmas

2015 ◽  
Vol 33 (3) ◽  
pp. 397-403 ◽  
Author(s):  
S. Zare ◽  
S. Rezaee ◽  
E. Yazdani ◽  
A. Anvari ◽  
R. Sadighi-Bonabi
Keyword(s):  
Laser Beam ◽  
Laser Energy ◽  
Oscillation Amplitude ◽  
Beam Width ◽  
Spot Size ◽  
Collisional Plasma ◽  
Laser Spot ◽  
Quantum Plasma ◽  
Laser Spot Size ◽  
Self Focusing

AbstractPropagation of Gaussian X-ray laser beam is presented in collisional quantum plasma and the beam width oscillation is studied along the propagation direction. It is noticed that due to energy absorption in collisional plasma, the laser energy drops to an amount less than the critical value of the self-focusing effect and consequently, the laser beam defocuses. It is found that the oscillation amplitude of the laser spot size enhances while passing through collisional plasma. For the greater values of collision frequency, the beam width oscillates with higher amplitude and defocuses in a shallower plasma depth. Also, it is realized that in a dense plasma environment, the laser self-focusing occurs earlier with the higher oscillation amplitude, smaller laser spot size and more oscillations.

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

scholarly journals Self-focusing of laser beam in collisional plasma and its effect on Second Harmonic generation

2011 ◽  
Vol 29 (4) ◽  
pp. 407-414 ◽  
Author(s):  
Arvinder Singh ◽  
Keshav Walia
Keyword(s):  
Second Harmonic Generation ◽  
Laser Beam ◽  
Plasma Wave ◽  
Plasma Density ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Collisional Plasma ◽  
Self Focusing ◽  
Beam Plasma ◽  
Non Linear

AbstractThis paper presents an investigation of self-focusing of Gaussian laser beam in collisional plasma and its effect on second harmonic generation. Due to non-uniform heating, collisional non-linearity arises, which leads to redistribution of carriers and hence affects the plasma wave, which in turn affects the second harmonic generation. Effect of the intensity of the laser beam/plasma density on the harmonic yield is studied in detail. We have set up the non-linear differential equations for the beam width parameters of the main beam, plasma wave, second harmonic generation and second harmonic yield by taking full non-linear part of the dielectric constant of collisional plasma with the help of moment theory approach. It is predicted from the analysis that harmonic yield increases/decreases due to increase in the plasma density/intensity of the laser beam respectively.

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
Sign in / Sign up

Export Citation Format

Share Document