Nonlinear Spectral Signatures and Spatiotemporal Behavior of Stimulated Raman Scattering from Single Laser Speckles

Journal Article · Fri Dec 09 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.245003· OSTI ID:20699679

Vu, H X; Yin, L; DuBois, D F; Bezzerides, B; Dodd, E S ^[1]

---

1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Simulations are reported of the Thomson scatter spectrum of electrostatic waves (ESWs) excited in single laser hot spots by backward stimulated Raman scattering (BSRS). Under conditions similar those in the recent experiments of Kline et al. [Phys. Rev. Lett. 94, 175003 (2005)], a spectral streak, resulting from the trapping-induced frequency shift of the ESW, is found for high wave-number ESWs, similar to the observations. This shift and parametric frequency matching lead to isolated BSRS pulses. Modes with acoustic dispersion, resulting from the trapping-modified electron velocity distribution, can enhance the frequency range of the streak.

• OSTI ID: 20699679
• Journal Information: Physical Review Letters, Vol. 95, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.95.245003; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
HOT SPOTS
LASERS
LIGHT TRANSMISSION
NONLINEAR PROBLEMS
PLASMA
PLASMA SIMULATION
PLASMA WAVES
PULSES
RAMAN EFFECT
SPECTRA
SPECTRAL SHIFT
TRAPPING
VELOCITY