ABSTRACT
Stimulated Brillouin scattering of KrF laser radiation focused in SF(6) gas at pressures of 1.4 to 9.8 atm has been studied experimentally. For an input linewidth of 0.08 cm(-1) and focal lengths of 1 and 2 m, reflectivities of 80% have been measured. Pulse compression up to peak intensities of two times the pump intensity has been achieved in a pulse that is partially phase conjugate to the pump pulse. At high pressures a short backward Raman spike was observed preceding the Brillouin backscattered signal.
ABSTRACT
An experimental investigation of phase conjugation and pulse compression by stimulated Raman scattering in methane gas using a narrow-linewidth KrF-laser pump is presented. Good spatial reproduction of the pump beam is observed at reflectivities of up to 80%. With a pump-pulse duration of 25 nsec, backward Stokes pulses of 5-nsec duration with 40% of the 100-mJ pump energy were obtained.
