Direct observation of laser beam filamentation in an underdense plasma

1982 ◽  
Vol 53 (1) ◽  
pp. 215-217 ◽  
Author(s):  
Chan Joshi ◽  
Christopher E. Clayton ◽  
Akio Yasuda ◽  
Francis F. Chen
Keyword(s):  
Laser Beam ◽  
Direct Observation ◽  
Underdense Plasma

Direct observation of nonlinear scattering of electrons by laser beam

1965 ◽  
Vol 19 (3) ◽  
pp. 202-203 ◽  
Author(s):  
H. Schwarz ◽  
H.A. Tourtellotte ◽  
W.W. Gaertner
Keyword(s):  
Laser Beam ◽  
Direct Observation ◽  
Nonlinear Scattering

Electron self-injection and acceleration driven by a tightly focused intense laser beam in an underdense plasma

2005 ◽  
Vol 12 (1) ◽  
pp. 013105 ◽  
Author(s):  
Han Xu ◽  
Wei Yu ◽  
Peixiang Lu ◽  
V. K. Senecha ◽  
Feng He ◽  
...  
Keyword(s):  
Laser Beam ◽  
Intense Laser ◽  
Intense Laser Beam ◽  
Underdense Plasma

scholarly journals Laser beam self-focusing in an nc/100 plasma with 20 ns and 3 ns pulses

1986 ◽  
Vol 4 (3-4) ◽  
pp. 435-438
Author(s):  
A. Giulietti ◽  
D. Giulietti ◽  
M. Lucchesi ◽  
M. Vaselli
Keyword(s):  
Laser Beam ◽  
Optical Breakdown ◽  
Self Focusing ◽  
Underdense Plasma

The interaction of a laser beam (1·06 μm) with an underdense plasma produced by optical breakdown of helium was experimentally studied. Evidence for whole beam self-focusing is reported and discussed.

Intense diffraction of a laser beam due to self‐focusing in underdense plasma

1985 ◽  
Vol 58 (8) ◽  
pp. 2916-2921 ◽  
Author(s):  
D. Giulietti ◽  
A. Giulietti ◽  
M. Lucchesi ◽  
M. Vaselli
Keyword(s):  
Laser Beam ◽  
Self Focusing ◽  
Underdense Plasma

scholarly journals Direct Observation of Transfer of Angular Momentum to Absorptive Particles from a Laser Beam with a Phase Singularity

1995 ◽  
Vol 75 (5) ◽  
pp. 826-829 ◽  
Author(s):  
H. He ◽  
M. E. J. Friese ◽  
N. R. Heckenberg ◽  
H. Rubinsztein-Dunlop
Keyword(s):  
Angular Momentum ◽  
Laser Beam ◽  
Direct Observation ◽  
Phase Singularity

scholarly journals Second-harmonic generation by relativistic self-focusing of cosh-Gaussian laser beam in underdense plasma

2015 ◽  
Vol 34 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Arvinder Singh ◽  
Naveen Gupta
Keyword(s):  
Differential Equation ◽  
Second Harmonic Generation ◽  
Laser Beam ◽  
Plasma Wave ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Spot Size ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Underdense Plasma

AbstractThis paper presents theoretical investigation of effect of relativistic self-focusing of cosh-Gaussian (ChG) laser beam on second-harmonic generation in an underdense plasma. Steep transverse density gradients are produced in the plasma by the electron plasma wave excited by relativistic self-focusing of ChG laser beam. The generated plasma wave interacts with the pump beam to produce its second harmonics. Following Jeffrey Wentzel Kramers Brillouin (J.W.K.B) approximation and moment theory the differential equation governing the evolution of spot size of laser beam with distance of propagation has been derived. The differential equation so obtained has been solved numerically by the Runge–Kutta method to investigate the effect of decentered parameter, intensity of laser beam as well as density of plasma on self-focusing of the ChG laser beam, and generation of its second harmonics. It has been observed that the peak intensity of the laser beam shifts in the transverse direction by changing the decentered parameter and a noticeable change is observed on focusing of the laser beam as well as on conversion efficiency of second harmonics.

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