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Quasi phase matching in femtosecond pulse volume structured x‐cut lithium niobate
Author(s) -
Thomas Jens,
Hilbert Vinzenz,
Geiss Reinhard,
Pertsch Thomas,
Tünnermann Andreas,
Nolte Stefan
Publication year - 2013
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201200116
Subject(s) - femtosecond , lithium niobate , materials science , optics , phase (matter) , quasi phase matching , phase matching , nonlinear optics , signal (programming language) , refractive index , femtosecond pulse , crystal (programming language) , pulse (music) , ultrashort pulse , nonlinear system , optoelectronics , laser , physics , quantum mechanics , detector , computer science , programming language
Abstract All optical inscription of quasi phase matching structures in an x‐cut LiNbO 3 crystal is demonstrated. Quasi phase matching is obtained by periodically lowering the nonlinear refractive index of the crystal using focussed ultrashort pulses. The structures were used to frequency double 1.55 µm light. The converted signal could be enhanced by a factor of 70 with respect to the unmodified material. From these measurement it could be deduced that the nonlinearity has been periodically damped up to 20%.