Possibility of pulse compression of a short-pulse 
laser in a plasma

Shibu, S.; Parashar, J.; Pandey, H. D.

doi:10.1017/s0022377897006156

Cited by 23 publications

(14 citation statements)

References 5 publications

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“…is the relativistic factor, e is the electronic charge, n 0 is the background plasma density, ω p is the background plasma frequency and ω is the frequency of the laser beam. The dielectric constant of plasma in the relativistic regime [21,[24][25][26][27][28] can be written as…”

Section: D Laser Pulse Compression: the Analytical Frameworkmentioning

confidence: 99%

Relativistic laser pulse compression in plasmas with a linear axial density gradient

Sharma¹,

Kourakis

2010

Plasma Phys. Control. Fusion

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The self-compression of a relativistic Gaussian laser pulse propagating in a non-uniform plasma is investigated. A linear density inhomogeneity (density ramp) is assumed in the axial direction. The nonlinear Schrödinger equation is first solved within a one-dimensional geometry by using the paraxial formalism to demonstrate the occurrence of longitudinal pulse compression and the associated increase in intensity. Both longitudinal and transverse selfcompression in plasma is examined for a finite extent Gaussian laser pulse. A pair of appropriate trial functions, for the beam width parameter (in space) and the pulse width parameter (in time) are defined and the corresponding equations of space and time evolution are derived. A numerical investigation shows that inhomogeneity in the plasma can further boost the compression mechanism and localize the pulse intensity, in comparison with a homogeneous plasma. A 100 fs pulse is compressed in an inhomogeneous plasma medium by more than ten times. Our findings indicate the possibility for the generation of particularly intense and short pulses, with relevance to the future development of tabletop high-power ultrashort laser pulse based particle acceleration devices and associated high harmonic generation. An extension of the model is proposed to investigate relativistic laser pulse compression in magnetized plasmas.

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Section: D Laser Pulse Compression: the Analytical Frameworkmentioning

confidence: 99%

Relativistic laser pulse compression in plasmas with a linear axial density gradient

Sharma¹,

Kourakis

2010

Plasma Phys. Control. Fusion

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“…A set of analytical expressions for the spot size and for the length evolution of a short laser pulse were derived in their model. Shibu et al [43] also proposed the possibility of pulse compression in relativistic homogeneous plasma and investigated the interplay between transverse focusing and longitudinal compression.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of dark hollow Gaussian laser pulses in relativistic plasma

et al. 2013

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Optical beams with null central intensity have potential applications in the field of atom optics. The spatial and temporal evolution of a central shadow dark hollow Gaussian (DHG) relativistic laser pulse propagating in a plasma is studied in this article for first principles. A nonlinear Schrodinger-type equation is obtained for the beam spot profile and then solved numerically to investigate the pulse propagation characteristics. As series of numerical simulations are employed to trace the profile of the focused and compressed DHG laser pulse as it propagates through the plasma. The theoretical and simulation results predict that higher-order DHG pulses show smaller divergence as they propagate and, thus, lead to enhanced energy transport.

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“…Also the possibility of relativistic pulse compression of a short-pulse laser in a plasma was investigated in Ref. [37]. Recently, extreme self-compression of optical solitons to single-cycle duration is revealed in the ionization regime [38].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Evolution of Intense Short Gaussian Laser Pulses in Weakly Relativistic Magnetized Plasma

Olumi

Maraghechi

2016

Contrib. Plasma Phys.

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Key words High-intensity lasers, ultra-short pulses, relativistic nonlinearity, self-focusing in plasma, selfcompression in plasma.The weakly relativistic regime of propagation of a short and intense laser pulse in the magnetized plasma is investigated. By considering relativistic nonlinearity and using non-linear Schrödinger equation with paraxial approximation, two second-order coupled differential equations are obtained for the longitudinal pulse width parameter (in time) and for the transverse pulse width parameter (in space). The simultaneous evolution of spot size and length of a relativistic Gaussian laser pulse in a magnetized plasma can be calculated by the numerical solution of the equations. The effect of magnetic field is investigated. It is observed that in the presence of magnetic field both the self-compression and the self-focusing can be enhanced. Furthermore, the interplay between the longitudinal self-compression and the transverse self-focusing in a magnetized plasma is investigated.

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Possibility of pulse compression of a short-pulse laser in a plasma

Cited by 23 publications

References 5 publications

Relativistic laser pulse compression in plasmas with a linear axial density gradient

Relativistic laser pulse compression in plasmas with a linear axial density gradient

Dynamics of dark hollow Gaussian laser pulses in relativistic plasma

Spatiotemporal Evolution of Intense Short Gaussian Laser Pulses in Weakly Relativistic Magnetized Plasma

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