We report on the observation of Type I third-harmonic generation induced by a train of femtosecond laser pulses in nematic liquid crystals. We find that as the average power of the train is increased, the frequency conversion process is enhanced as a consequence of the tight confinement of the pulses into a nonlocal spatial soliton.
© 2010 Optical Society of America
Original Manuscript: July 28, 2010
Revised Manuscript: September 8, 2010
Manuscript Accepted: September 10, 2010
Published: October 8, 2010
M. Peccianti, A. Pasquazi, G. Assanto, and R. Morandotti, "Enhancement of third-harmonic generation in nonlocal spatial solitons," Opt. Lett. 35, 3342-3344 (2010)