Title :
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
fDate :
12/1/1992 12:00:00 AM
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, k0c 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;
Journal_Title :
Plasma Science, IEEE Transactions on
