Self-focussing of a laser beam in a multiply ionized, absorbing plasma

Pizzo, V. Del; Luther‐Davies, Barry; Siegrist, Michael

doi:10.1007/bf00934416

Cited by 4 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(a) Extensive studies have been made of self-focusing of a laser beam in a plasma with the aim of determining the optimum plasma and laser conditions in which to achieve whole beam self-focusing and thereby obtain a concentration of the available laser power into a single filament of high intensity. The computational work has been based upon the transient self-focusing (TRSF) numerical code developed by Siegrist [2] .Two self-focusing mechanisms are considered applicable for the short pulse regime (< 10 nsec) treated here, those being the ponderomotive force [3] and relativistic self-focusing [4] [5] mechanism respectively. Using TRSF it has been found, that plasma pressure effects dominate the self-focusing behaviour only for high temperatures (> 300 ev for D2 ; > 3 KeV for Al) .…”

Section: ) Target Interaction On Experimentsmentioning

confidence: 99%

Results on Inertial Confinement Nuclear Fusion in Australia

Hora

1980

The Review of Laser Engineering

View full text Add to dashboard Cite

Section: ) Target Interaction On Experimentsmentioning

confidence: 99%

Results on Inertial Confinement Nuclear Fusion in Australia

Hora

1980

The Review of Laser Engineering

View full text Add to dashboard Cite

Spatial and temporal electron and ion density variations within the focal region of an intense laser beam in a tenuous plasma

Mavaddat

1980

Appl. Phys.

View full text Add to dashboard Cite

Theory of lossless suppression of filamentation in high-power laser beams

Felber

Chernin

1981

Journal of Applied Physics

View full text Add to dashboard Cite

This paper supports an earlier suggestion that saturation of the optical nonlinearity of a medium by a plane wave will suppress filamentation of the wave. A variational approach and exact solutions of the slowly-varying-envelope approximation of the linearized wave equation describe the growth of localized filaments on plane waves. The solutions show that a wave will be stable against filamentation if the wave is weak or if it is intense enough to saturate the nonlinearity of the medium. Experiments are proposed to demonstrate suppression of filamentation of CO2 laser beams exceeding 1010 W and Nd laser beams exceeding 1012 W in fully ionized hydrogen plasmas. The beams saturate the nonlinearity of the plasma by ponderomotive forces; absorption is negligible in the rarefied channel produced by the laser. Applications may include lossless filters that remove intensity hot spots from beams or convert mulitmode beams to nearly single mode.

show abstract

Self-focussing of a laser beam in a multiply ionized, absorbing plasma

Cited by 4 publications

References 5 publications

Results on Inertial Confinement Nuclear Fusion in Australia

Results on Inertial Confinement Nuclear Fusion in Australia

Spatial and temporal electron and ion density variations within the focal region of an intense laser beam in a tenuous plasma

Theory of lossless suppression of filamentation in high-power laser beams

Contact Info

Product

Resources

About