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Opt Lett. 2010 Oct 15;35(20):3342-4. doi: 10.1364/OL.35.003342.

Enhancement of third-harmonic generation in nonlocal spatial solitons.

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INRS Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel Boulet, Varennes Québec, J3X 1S2 Canada.


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.


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