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Second harmonic stimulated Raman scattering of laser radiation in a plasma

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1 Author(s)
Ramachandran, K. ; Dept. of Phys., Indian Inst. of Technol., Delhi, India

A high-power linearly polarized laser propagating through a plasma produces oscillatory electron velocity at the second harmonic due to-the ν&oarr;×B&oarr; force, This velocity couples a Langmuir wave (ω, k&oarr;) and an electromagnetic wave (ω1, k&oarr;1), where ω1=ω-2ω0 , k-2k&oarr;0 and ω0, k&oarr;0 are frequency and wavenumber of the laser pump, causing second harmonic Raman scattering. The growth rate is maximum for side scattering. This process can occur above the quarter critical density, unlike the first harmonic stimulated Raman scattering which occurs below the quarter critical density

Published in:

Plasma Science, IEEE Transactions on  (Volume:24 ,  Issue: 2 )