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

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2 Author(s)
J. Parashar ; Center for Energy Studies, Indian Inst. of Technol., New Delhi, India ; H. D. Pandey

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

Published in:

IEEE Transactions on Plasma Science  (Volume:20 ,  Issue: 6 )