Second-harmonic generation of laser radiation in a plasma with a density ripple

Author

Parashar, Jetendra ; Pandey, H.D.

Author_Institution

Center for Energy Studies, Indian Inst. of Technol., New Delhi, India

Volume

20

Issue

6

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

996

Lastpage

999

Abstract

High-power laser radiation with frequency ω₁ and wave vector k₁zˆ propagating through a plasma at an angle to a density ripple (0,k&oarr;₀) produces current and density perturbation at (ω₁,k &oarr;₁+k&oarr;₀). The density perturbation couples with the oscillatory velocity at (ω₁,k&oarr;₁) to produce nonlinear current at [2ω₁, (2k&oarr;₁+k&oarr; ₀)] driving second-harmonic electromagnetic radiation. For a specific value of ripple wave number k₀=k _0c, the phase-matching conditions for the second-harmonic process are satisfied, leading to resonant enhancement in the efficiency of energy conversion, k_0c decreases with the frequency ω₁ of the laser

Keywords

light propagation in plasma; optical harmonic generation; plasma density; plasma transport processes; current perturbation; density perturbation; density ripple; energy conversion; laser radiation; light propagation; nonlinear current; oscillatory velocity; phase-matching conditions; plasma; resonant enhancement; ripple wave number; second-harmonic electromagnetic radiation; second-harmonic generation; Dispersion; Electromagnetic propagation; Electromagnetic radiation; Frequency conversion; Laser modes; Optical propagation; Plasma density; Plasma diagnostics; Plasma waves; Resonance;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.199564

Filename

199564