Figure 6: Transition to the nonlinear regime and threshold.
From: Laser light triggers increased Raman amplification in the regime of nonlinear Landau damping
(a) Reamplification as defined in the main text calculated over a wavelength range of 20 nm around 770 and 720 nm as a function of time. The transition in the region dominated by Landau damping (720 nm) is observed at t=2.58 ns, (b) time history of the foil SRS reflected intensity measured at 720 and 770 nm. At t=2.58 ns, the wave scattered at 720 nm reaches an intensity of ISRS,foil≈5 × 1011 W cm−2.
