Frequency mixing of high intensity laser light with stimulated Raman backscattered radiation in underdense plasmas

Journal Article · Tue Sep 01 00:00:00 EDT 1998 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.58.4030· OSTI ID:641625

Krushelnick, K ^[1]; Moore, C I ^[2]; Ting, A; Burris, H R ^[3]

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1. Laboratory of Plasma Studies, Cornell University, Ithaca, New York 14853 (United States)
2. Omega-P, Inc., New Haven, Connecticut 06520 (United States)
3. Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)

Sidescattered radiation from the interaction of an ultraintense laser pulse (P{gt}2thinspTW) with underdense helium plasmas (n{sub e}{approx}10{sup 19}thinspcm{sup {minus}3}) is measured and emission at 90{degree} from the axis of laser propagation is observed to be broadened significantly near the second harmonic ({Delta}{lambda}=30{endash}40thinspnm). This result is consistent with sum frequency mixing of forward propagating laser light and the broadened backscattered stimulated Raman scattered radiation that occurs within transient filamentary structures produced by the ponderomotive force of the focused laser pulse. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 641625
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 58, Issue 3; Other Information: PBD: Sep 1998
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
HELIUM
FREQUENCY MIXING
HARMONIC GENERATION
BEAM-PLASMA SYSTEMS
RAMAN EFFECT
LASER RADIATION
LIGHT SCATTERING
BACKSCATTERING