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- W2102073290 abstract "Abstract An analytical formalism of self focusing and self-phase modulation of an intense short pulse laser in a plasma due to relativistic and ponderomotive nonlinearities is developed. In the paraxial ray approximation, the pulse retains its Gaussian radial profile, however, its spot size varies with the distance of propagation in a periodic manner. It is influenced by self focusing. The frequency of the laser undergoes red shift. For a tanhyperbolic temporal profile of pulse, the red-shift is maximum at the foot of the pulse and decreases slowly as one goes to higher and higher intensity portions. The effect of ponderomotive nonlinearity is very significant in this respect. The maximum downshift occurs at a distance at which the laser acquires a minimum spot size. With retarded time normalized axial intensity increases more at z ~ R d and the radial intensity is also more narrowly peaked at z ~ R d , where R d = 2π r 0 2 /λ is the Rayleigh length, r 0 and λ are the spot size and wavelength of the laser pulse respectively." @default.
- W2102073290 created "2016-06-24" @default.
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- W2102073290 date "2009-03-12" @default.
- W2102073290 modified "2023-10-18" @default.
- W2102073290 title "Self-phase modulation of a laser in self created plasma channel" @default.
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- W2102073290 doi "https://doi.org/10.1017/s0263034609000330" @default.
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