Influence of self-focused Laguerre-Gaussian laser beam on second harmonic generation in collisionless plasma having density transition

Bhatia, Aman; Walia, Keshav; Singh, Arvinder

doi:10.1016/j.ijleo.2021.167747

Cited by 15 publications

(2 citation statements)

References 47 publications

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“…Out of the various laser-plasma instabilities discussed above, the phenomenon of self-focusing occupies a major role as a result of the direct connection with several other instabilities. [22][23][24][25][26][27][28][29]. The self-focusing phenomenon was initially given by Askar'yan in 1962 [30].…”

Section: Introductionmentioning

confidence: 99%

Propagation characteristics of a high-power beam in weakly relativistic-ponderomotive thermal quantum plasma

Walia

2023

Commun. Theor. Phys.

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The present work explores the propagation characteristics of high power beam in weakly relativistic-ponderomotive thermal quantum plasma (TQP). Q-gaussian laser beam is taken in present investigation. The quasi optics equation obtained in present study is solved through well established WKB approximation and paraxial theory approach for obtaining 2nd order differential equation describing the behavior of beam width of laser beam. Further, numerical simulation of this 2nd order differential equation is carried out for determining the behavior of beam width with dimensionless distance for established laser-plasma parameters. The comparison of present study is made with ordinary quantum plasma and classical relativistic plasma cases

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Section: Introductionmentioning

confidence: 99%

Propagation characteristics of a high-power beam in weakly relativistic-ponderomotive thermal quantum plasma

Walia

2023

Commun. Theor. Phys.

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“…In this method, EPW generated at input wave frequency interacts nonlinearly with input wave resulting in the production of SHG. Major work on this mechanism has been done by various theoretical and experimental research groups in the past [40][41][42][43][44][45][46][47][48][49][50][51]. The commanding role is played by plasma wave production in laser-induced fusion due to the generation of high velocity electrons.…”

Section: Introductionmentioning

confidence: 99%

Second harmonic generation of high power Cosh-Gaussian beam in cold collisionless plasma

Walia¹,

Singh²,

Tripathi³

2022

Commun. Theor. Phys.

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The purpose of this study is to explore Second harmonic generation (SHG) of high power Cosh-Gaussian beam in cold collisionless plasma. The ponderomotive force causes carrier redistribution from high field to low field region in presence of Cosh-gaussian beam thereby producing density gradients in transverse direction. The density gradients so produced results in electron plasma wave (EPW) generation at frequency of input beam. The EPW interacts with input beam resulting in production of 2nd harmonics. WKB and paraxial approximations are employed for obtaining 2nd order differential equation describing behavior of beam’s spot size against normalized distance. The impact of well established laser-plasma parameters on behavior of beam’s spot size and SHG yield are also analyzed. The focusing behavior of beam and SHG yield are enhanced with increase in density of plasma, radius of beam and decentred parameter and with decrease in intensity of beam. The results of current problem are really helpful for complete information of laser-plasma interaction physics.

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Nonlinear Dynamics of Intense Laser Beam in Unmagnetized Plasma and its Influence on Second Harmonic Generation

Walia

2022

J Fusion Energ

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Influence of self-focused Laguerre-Gaussian laser beam on second harmonic generation in collisionless plasma having density transition

Cited by 15 publications

References 47 publications

Propagation characteristics of a high-power beam in weakly relativistic-ponderomotive thermal quantum plasma

Propagation characteristics of a high-power beam in weakly relativistic-ponderomotive thermal quantum plasma

Second harmonic generation of high power Cosh-Gaussian beam in cold collisionless plasma

Nonlinear Dynamics of Intense Laser Beam in Unmagnetized Plasma and its Influence on Second Harmonic Generation

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