White-Light Parametric Instabilities in Plasmas
Open Access
- 6 June 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 98 (23), 235001
- https://doi.org/10.1103/physrevlett.98.235001
Abstract
Parametric instabilities driven by partially coherent radiation in plasmas are described by a generalized statistical Wigner-Moyal set of equations, formally equivalent to the full wave equation, coupled to the plasma fluid equations. A generalized dispersion relation for stimulated Raman scattering driven by a partially coherent pump field is derived, revealing a growth rate dependence, with the coherence width of the radiation field, scaling with for backscattering (three-wave process), and with for direct forward scattering (four-wave process). Our results demonstrate the possibility to control the growth rates of these instabilities by properly using broadband pump radiation fields.
Keywords
This publication has 25 references indexed in Scilit:
- Transverse modulational instability of partially incoherent soliton stripesPhysical Review E, 2004
- Features of modulational instability of partially coherent light: Importance of the incoherence spectrumPhysical Review E, 2004
- Incoherent white light solitons in logarithmically saturable noninstantaneous nonlinear mediaPhysical Review E, 2003
- White-light solitonsOptics Letters, 2003
- Propagation of incoherent “white” light and modulation instability in noninstantaneous nonlinear mediaPhysical Review E, 2002
- Statistical theory for incoherent light propagation in nonlinear mediaPhysical Review E, 2002
- Explorers deliver tea to the poleNature, 1997
- Theory of Incoherent Self-Focusing in Biased Photorefractive MediaPhysical Review Letters, 1997
- Self-Trapping of Partially Spatially Incoherent LightPhysical Review Letters, 1996
- Physical processes in eclipsing pulsars: Eclipse mechanisms and diagnosticsThe Astrophysical Journal, 1994