  We propose a method for increasing the Raman scattering from an ensemble of
molecules by up to four orders of magnitude. Our method requires an additional
coherent source of IR radiation with the half-frequency of the Stokes shift.
This radiation excites the molecule electronic subsystem that in turn, via
Fr\"ohlich coupling, parametrically excites nuclear oscillations at a resonant
frequency. This motion is coherent and leads to a boost of the Raman signal in
comparison to the spontaneous signal because its intensity is proportional to
the squared number of molecules in the illuminated volume.
