Development and experimental demonstration of negative first-order quasi-phase matching in a periodically poled Rb-doped KTiOPO4 crystal

We worked on a new scheme of quasi-phase matching (QPM) based on the negative first order of the spatial modulation of the sign of the second-order nonlinearity. Applying this scheme in the case of angular-QPM (AQPM) in a biaxial crystal reveals new directions of propagation for efficient parametric...

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Bibliographic Details
Published in:Optics letters 2020-11, Vol.45 (21), p.6026-6029
Main Authors: Petit, Yannick, Peña, Alexandra, Segonds, Patricia, Debray, Jérôme, Joly, Simon, Zukauskas, Andrius, Laurell, Fredrik, Pasiskevicius, Valdas, Canalias, Carlota, Boulanger, Benoît
Format: Article
Language:English
Subjects:
Chemical Sciences
Crystal optics
Lithium niobates
Material chemistry
Phase matching
Potassium titanyl orthophosphate
Rubidium
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Summary:We worked on a new scheme of quasi-phase matching (QPM) based on the negative first order of the spatial modulation of the sign of the second-order nonlinearity. Applying this scheme in the case of angular-QPM (AQPM) in a biaxial crystal reveals new directions of propagation for efficient parametric frequency conversion as well as "giant" spectral acceptances. The experimental validation is performed in a periodically poled rubidium-doped KTiOPO4 biaxial crystal. This new approach naturally extends to other periodically poled uniaxial crystals such as periodically poled LiNbO3.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.408839