High energy-conversion efficiencies in Stimulated Raman Scattering (SRS) are demonstrated both in experiments and by simulations for pump powers below SRS threshold. The scattering is induced by a short seed pulse at the Stokes frequency, the pulse width of which is much shorter than the pump pulse width and which is comparable with the medium's dephasing time.
Heeman, R. J., Godfried, H. P., & Witteman, W. J. (1995). Threshold and conversion experiments on seeded Raman scattering. Applied physics B: Lasers and optics, 60(5), 479-484. https://doi.org/10.1007/BF01081330