Saturation Spectra of the Two-Plasmon Decay Instability.

A nonlinear, reduced description of the saturated steady-state turbulence resulting from the two-plasmon decay instability is shown to lead to Langmuir wave and 3/2 {omega}{sub 0} radiation spectra which are in semiquantitative agreement with recent experimental observations of Meyer {ital et} {ital al}. [Phys. Rev. Lett. {bold 71}, 2915 (1993)]. Secondary Langmuir wave decay of the primary unstable waves is shown to be an important process for moderate laser intensities while strong turbulence effects are observed for higher intensities.