Laser Physics Letters
Generation of unipolar optical pulses in a Raman-active medium
Rostislav M. Arkhipov, Mikhail V. Arkhipov, P. Belov, Yu. A. Tolmachev, Ihar Babushkin
Abstract
Abstract Response of a Raman-active media (RAM) to the excitation by a series of ultrashort (few-cycle) optical pulses propagating at a superluminal velocity is studied theoretically. It is shown that under certain conditions rectangular unipolar pulses (video-pulses) can be generated as the RAM response. The duration, shape and amplitude of these video-pulses can be widely tuned by modifying the pump pulse parameters.