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Quasi-phase matching via femtosecond laser-induced domain inversion in lithium niobate waveguides

Chen, Xin; Karpinski, Pawel; Shvedov, Vladlen; Boes, Andreas; Mitchell, Arnan; Krolikowski, Wieslaw; Sheng, Yan


We demonstrate an all-optical fabrication method of quasi-phase matching structures in lithium niobate (LiNbO₃) waveguides using a tightly focused femtosecond near-infrared laser beam (wavelength of 800 nm). In contrast to other all-optical schemes that utilize a periodic lowering of the nonlinear coefficient 𝜒⁽²⁾ by material modification, here the illumination of femtosecond pulses directly reverses the sign of 𝜒⁽²⁾ through the process of ferroelectric domain inversion. The resulting...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Optics Letters
DOI: 10.1364/OL.41.002410


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