We demonstrate the efficient modulation of an ∼100-femtosecond pulse in a Raman medium coherently prepared by nanosecond pulses. Raman sidebands of the ultrashort pulse spanning 360 THz are generated with an efficiency of >5%. We show that the mechanism permitting the sidebands to be generated is the preparation of a significant vibrational coherence in the medium that is robust to disturbance by an intense short pulse. If the observed sidebands were phase compensated, they would form a short train of approximately ten 3-fs pulses. Focusing would permit the realization of a peak intensity of >10^13 W cm^-2.
© 2005 Optical Society of America
Sarah Gundry, Marcel P. Anscombe, Abubaker M. Abdulla, Emiliano Sali, John W. G. Tisch, Paul Kinsler, Geoffrey H. C. New, and Jon P. Marangos, "Ultrashort-pulse modulation in adiabatically prepared Raman media," Opt. Lett. 30, 180-182 (2005)