Optical characterization of pulsed-laser-deposited LiNbO3 waveguides

Philippe Di Bin; Catherine Di Bin; Ismail Bouibrine; Laurent Canale

doi:10.1117/12.513886

25 February 2004 Optical characterization of pulsed-laser-deposited LiNbO₃ waveguides

Philippe Di Bin, Catherine Di Bin, Ismail Bouibrine, Laurent Canale

Proceedings Volume 5250, Advances in Optical Thin Films; (2004) https://doi.org/10.1117/12.513886
Event: Optical Systems Design, 2003, St. Etienne, France

Abstract

Lithium niobate (LiNbO₃) thin films for optical waveguide purpose have been grown on (0001) sapphire substrates using the pulsed laser deposition technique at the wavelength of 355 nm. To improve surface smoothness of the films, an off-axis deposition geometry with substrates parallel to the plasma plume has been used. Optical properties have been studied based on excitation of guided modes in the film with a prism coupler. M-lines observations associated to extraction of guided light in the films have shown that planar LiNbO₃ optical waveguide have been elaborated. The propagation losses at 633 nm have been estimated by measurement of light streak intensity along the propagation direction with a CCD camera. Values of 4.8 and 5.8 dB cm^-1 have been attained for TM₀ and TE₀ guided modes, respectively. The light scattering is mainly due to the presence of residual droplets on the film surface.

Citation Download Citation

Philippe Di Bin, Catherine Di Bin, Ismail Bouibrine, and Laurent Canale "Optical characterization of pulsed-laser-deposited LiNbO₃ waveguides", Proc. SPIE 5250, Advances in Optical Thin Films, (25 February 2004); https://doi.org/10.1117/12.513886

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