Influence of linear absorption and density ramp on self-focusing of the Hermite-Gaussian chirped pulse laser in plasma

Kant, Niti; Thakur, Vishal

doi:10.1007/s11082-020-02641-w

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…Most of the work in optical guiding of the laser beam and its effect on second-harmonic generation has been carried out by using the Gaussian intensity profile under the paraxial ray approximation. Recently, Kant and Thakur (2021) analysed the self-focusing of the Hermite-Gaussian chirped pulse laser in plasma under the influence of linear absorption by using the paraxial approximation theory. The impulse of the present work resides in investigating the effect of a preformed parabolic density channel on the optical guiding of highly intense Hermite Gaussian laser beam and the generation of second harmonics in plasma by the moment theory approach suggested by Lam et al 1977. This paper is structured in the following way: Sect.…”

Section: Introductionmentioning

confidence: 99%

Optical guiding of intense Hermite–Gaussian laser beam in preformed plasma channel and second harmonic generation

Wadhwa¹,

Singh²

2021

Opt Quant Electron

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This work presents the scheme of optical channeling of the intense Hermite Gaussian laser beam and second-harmonic generation in plasma having the preformed plasma channel, where relativistic nonlinearity is operative. Excitation of the electron plasma wave at the incident beam frequency leads its coupling with the latter produces the second harmonics of the beam. For the formulation of differential equations for the beam waists of the Hermite Gaussian laser beam propagating through the channel, the method of moments has been used. The solutions of the coupled differential equations are found using Runge Kutta fourth-order numerical method. Perturbation theory has been applied to find the equation governing the excitation of electron plasma wave and hence the source term for the second-harmonic yield. It has been observed that the preformed plasma channel helps to optically guide the laser beam and enhances the efficiency of second-harmonic generation of various modes of the Hermite Gaussian laser beam in plasma.

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Section: Introductionmentioning

confidence: 99%

Optical guiding of intense Hermite–Gaussian laser beam in preformed plasma channel and second harmonic generation

Wadhwa¹,

Singh²

2021

Opt Quant Electron

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“…When the intense femtosecond laser pulses propagate in gas media, filaments form under the dynamic balance between self-focusing and defocusing [1,2]. Due to the unqiue characteristics of filaments, such as high clamped intensity, strong penetrability, and long propagation distance, femtosecond filamentation has shown potential application in the fields of ultrafast spectroscopy and nonlinear optics [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Investigations of the properties of filaments generated in gas mixtures pumped by femtosecond laser pulses

Jing¹,

Wang²,

Qi³

2021

J. Opt.

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In this paper, we compare the properties of filaments generated in a Ne–N2 mixture, pure N2, a Kr–N2 mixture, and a Xe–N2 mixture pumped by femtosecond laser pulses systematically. Due to different nonlinear refractive indices and ionization potentials of these noble gases, the clamped intensity and plasma density can be tuned in a certain range when small amounts of different noble gases are injected into pure N2. In addition, we also demonstrate that a higher proportion of noble gas and shorter incident pulse duration can have the benefit of manipulating the plasma density on a relatively larger scale.

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Relativistic self-focusing of finite Airy-Gaussian laser beams in cold quantum plasma

Pawar¹,

Nikam²,

Kokare³

et al. 2021

J Opt

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Influence of linear absorption and density ramp on self-focusing of the Hermite-Gaussian chirped pulse laser in plasma

Cited by 11 publications

References 23 publications

Optical guiding of intense Hermite–Gaussian laser beam in preformed plasma channel and second harmonic generation

Optical guiding of intense Hermite–Gaussian laser beam in preformed plasma channel and second harmonic generation

Investigations of the properties of filaments generated in gas mixtures pumped by femtosecond laser pulses

Relativistic self-focusing of finite Airy-Gaussian laser beams in cold quantum plasma

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