Pulsed mid-infrared radiation from spectral broadening in laser wakefield simulations

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4813245· OSTI ID:22227966

Zhu, W.; Palastro, J. P.; Antonsen, T. M. ^[1]

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1. IREAP, University of Maryland, College Park, Maryland 20740 (United States)

Spectral red-shifting of high power laser pulses propagating through underdense plasma can be a source of ultrashort mid-infrared (MIR) radiation. During propagation, a high power laser pulse drives large amplitude plasma waves, depleting the pulse energy. At the same time, the large amplitude plasma wave provides a dynamic dielectric response that leads to spectral shifting. The loss of laser pulse energy and the approximate conservation of laser pulse action imply that spectral red-shifts accompany the depletion. In this paper, we investigate, through simulation, the parametric dependence of MIR generation on pulse energy, initial pulse duration, and plasma density.

• OSTI ID: 22227966
• Journal Information: Physics of Plasmas, Vol. 20, Issue 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
BEAM-PLASMA SYSTEMS
INFRARED RADIATION
LASERS
LINE BROADENING
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA SIMULATION
PLASMA WAVES
RED SHIFT
SPECTRAL SHIFT