Efficient energy conversion for cubic third-harmonic generation that is phase matched in KTiOPO(4)

We demonstrate, for the first time to our knowledge, that efficient third-harmonic generation can be achieved with a cubic contribution much larger than the quadratic processes. An energy-conversion efficiency of 2.4% is achieved for cubic third-harmonic generation that is phase matched along the x...

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Bibliographic Details
Published inOptics letters Vol. 25; no. 18; p. 1373
Main Authors Fève, J P, Boulanger, B, Guillien, Y
Format Journal Article
LanguageEnglish
Published United States 15.09.2000
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Summary:We demonstrate, for the first time to our knowledge, that efficient third-harmonic generation can be achieved with a cubic contribution much larger than the quadratic processes. An energy-conversion efficiency of 2.4% is achieved for cubic third-harmonic generation that is phase matched along the x axis of a KTiOPO(4) crystal by use of a picosecond fundamental laser emitting at 1618 nm. The associated cascading processes are only 10% of the pure cubic interaction, which is very suitable for study of the specific quantum optical correlations. Calculations of the third-harmonic generation conversion efficiency with respect to group-velocity dispersion and to the longitudinal Gaussian beam profile account well for our experimental results.
ISSN:0146-9592