Stimulated Raman scattering from symmetrically illuminated two-layered spherical targets with 527 nm laser light

Abstract

Spectrally shifted Raman light with time was observed from two-layered spherical targets irradiated with 527 nm random phased laser light. The target was composed of a foam shell and an outer thin plastic layer. The Raman spectrum shifted rapidly to the short-wavelength side during the laser pulse. The start timing was earlier than that of the usually observed Raman light at an experiment with a single-layered plastic shell target. It was inferred that a plasma shoulder with a long scale length moved outward on the expanding plasma, consistent with the observed Raman light.

Stimulated Raman scattering in a laser-produced plasma heated by laser at wavelength of 0.53 μm

“…Prior experiments have investigated SRS in plasmas produced from massive targets, thin foils, and gas jets [ 1-51. Laser interaction studies of intermediate cases, where the thickness of the limited size targets only slightly exceeded the burn-through depth, have been presented [6], and recent studies of stimulated Brillouin scattering (SBS) [7] and SRS from spherical targets [8] have been reported.…”