Enhancement of third harmonic generation in nonlocal spatial solitons
M. Peccianti, A. Pasquazi, G. Assanto and R. Morandotti
Opt. Lett. 35 (20), 3342 (2010)
Abstract: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.