Reflectivity profiles of phase conjugate waves produced via four-wave mixing in laser plasmas

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871953· OSTI ID:383779

Gupta, G P; Sinha, B K ^[1]

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1. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085 (India)

Theoretical profiles of power reflectivity of a phase conjugate electromagnetic wave generated by nearly degenerate four-wave mixing in a carbon plasma via parametric decay instability (PDI) are studied. The plasma is considered to be produced by irradiating a carbon slab target with an Nd:glass high-power laser pulse at an intensity above the PDI threshold. The plasma refractive index corresponding to the PDI region is taken into account in the wave equations. Two electromagnetic pump waves counterpropagating in the plasma are Nd:glass laser light waves and a weak electromagnetic probe wave incident upon the plasma, which is very slightly frequency upshifted relative to the pump waves. The effects of the frequency and angular detuning between the pump and probe waves, pump wave intensity, and plasma parameters on the reflectivity profiles have been investigated. It is noted that the plasma refractive index significantly affects the reflectivity profiles of the phase conjugate wave. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 383779
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
CARBON
FOUR-WAVE MIXING
LASER RADIATION
LASER-PRODUCED PLASMA
NONLINEAR OPTICS
PHASE CONJUGATION
REFRACTIVE INDEX