Raman technique for single-cycle pulses

We show that two Raman generators which have different Raman transition frequencies and are used in series result in a multiplicative increase in the total number of generated sidebands. When phase-corrected, these sidebands synthesize to a train of randomly timed single-cycle pulses. For series generators on the rotational transitions of molecular ${\mathrm{D}}_2$ $(J=\overrightarrow{0}2)$ and ${\mathrm{H}}_2$ $(J=\overrightarrow{1}3),$ each with 40 modes, the average peak power enhancement is 1600 and the average duration between random pulses is 1.74 ps.