منابع مشابه
Multifilament structures in relativistic self-focusing.
A simple model is derived to prove the multifilament structure of relativistic self-focusing with ultraintense lasers. Exact analytical solutions describing the transverse structure of waveguide channels with electron cavitation, for which both the relativistic and ponderomotive nonlinearities are taken into account, are presented.
متن کاملSelf-focusing on bounded domains
The critical nonlinear Schrödinger equation (NLS) on bounded domains models the propagation of cw laser beams in hollow-core fibers. Unlike the NLS on unbounded domains which models propagation in bulk media, the ground-state waveguide solutions are stable and the condition of critical power for singularity formation is generically sharp. © 2001 Elsevier Science B.V. All rights reserved. PACS: ...
متن کاملEffect of linear absorption on self-focusing.
We report the effect of linear absorption on self-focusing. Our experimental results show that power loss due to linear absorption before focus is responsible for the increase in the threshold power for self-focusing and that the critical power is independent of the linear absorption.
متن کاملAll-optical suppression of relativistic self-focusing of laser beams in plasmas.
It is demonstrated that a catastrophic relativistic self-focusing (RSF) of a high-power laser pulse can be prevented all-optically by a second, much weaker, copropagating pulse. RSF suppression occurs when the difference frequency of the pulses slightly exceeds the electron plasma frequency. The mutual defocusing is caused by the three-dimensional electron density perturbation driven by the las...
متن کاملNumerical simulation of short laser pulse relativistic self-focusing in underdense plasma
Existing experimental results on relativistic self-focusing are interpreted by means of the particle code WAKE using the ponderomotive approximation to describe the laser–plasma interaction @P. Mora and T. M. Antonsen, Jr., Phys. Plasmas 4, 217 ~1997!#. Novel features of the code, such as gas medium ionization and an enhanced paraxial approximation, allow more confidence in data interpretation....
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ژورنال
عنوان ژورنال: Laser and Particle Beams
سال: 1987
ISSN: 0263-0346,1469-803X
DOI: 10.1017/s0263034600002457