Ferroelectric-domain inversion induced by SiO2 cladding for LiNbO3 waveguide SHG

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Ferroelectric-domain inversion induced by SiO2 cladding for LiNbO3 waveguide SHG

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It was found that, by heating an LiNbO3 crystal with SiO2 cladding on the + z face, ferroelectric-domain inversion is induced under the cladding. The inversion method offers high reproducibility and is suitable for fabrication of quasiphase-matching waveguide SHG devices. A prototype device was fabricated and SHG was demonstrated using a CW-YAG laser.

Inspec keywords: optical waveguide components; silicon compounds; diffraction gratings; electric domains; optical harmonic generation; etching; integrated optics; lithium compounds; optical workshop techniques

Other keywords: nonlinear optics; quasiphase-matching waveguide SHG devices; etched grating; LiNbO3; fabrication; +z face cladding; second harmonic generation; CW-YAG laser; SiO2 cladding; LiNbO3-SiO2; SiO2; ferroelectric-domain inversion

Subjects: Integrated optics; Optical waveguides; Nonlinear optics and devices; Optical harmonic generation, frequency conversion, parametric oscillation and amplification; Integrated optics; Optical fabrication, surface grinding; Optical waveguides and couplers; Gratings, echelles

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