Stimulated dynamic light scattering (SDLS) in CS2 is studied by time-r
esolved pump-density-dependent experiments in this paper. It is found
that SDLS consists of two main contributions, one of which dominates a
t the rise time of the pump pulse, and the other around the peak of th
e high-density pump pulse. The former is related to molecular orientat
ion, damped intermolecular vibration, and molecular trnaslation, while
the latter is related to intermolecular interactions, Our experimenta
l results demonstrate that the SDLS due to dipole interaction has a hi
gher pump-power-density dependence than stimulated Raman scattering an
d SDLS due to molecular motions. The present experimental results also
demonstrate that the threshold of SDLS due to molecular motions depen
ds on the pump-pulse duration. SDLS can be greatly enhanced by extendi
ng the interaction length in a liquid-core waveguide. In our experimen
ts, the efficiency of SDLS is nearly 100% and the frequency shift of S
DLS covers hundreds of wave numbers in CS2 bulk liquid and 5000 cm(-1)
in a CS2 liquid-core waveguide.