Stimulated Thermal Scattering of Short Light Pulses

The value of the frequency shift in the spectrum of the stimulated thermal scattering, $\Delta \nu$, is shown to be proportional to the amplitude and the inverse duration of the incident light pulse and to depend in a minor way on its spectral width $\Delta {\nu }_0$. Under ordinary experimental conditions in liquids, the calculation yields $\Delta \nu \simeq 0.002 {\mathrm{cm}}^{-1\mathrm{}}\ll \frac{\Delta {\nu }_0}{2}\simeq 0.01$ ${\mathrm{cm}}^{-1\mathrm{}}$. The relation $\Delta \nu \ll \Delta {\nu }_0$ is experimentally confirmed.