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Proceedings Paper

Optical characterization of pulsed-laser-deposited LiNbO3 waveguides
Author(s): Philippe Di Bin; Catherine Di Bin; Ismail Bouibrine; Laurent Canale
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Paper 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.

Paper Details

Date Published: 25 February 2004
PDF: 8 pages
Proc. SPIE 5250, Advances in Optical Thin Films, (25 February 2004); doi: 10.1117/12.513886
Show Author Affiliations
Philippe Di Bin, Institut de Recherche en Communications Optiques et Micro-Ondes, CNRS-Univ. de Limoges (France)
Catherine Di Bin, Institut de Recherche en Communications Optiques et Micro-Ondes, CNRS-Univ. de Limoges (France)
Ismail Bouibrine, Institut de Recherche en Communications Optiques et Micro-Ondes, CNRS-Univ. de Limoges (France)
Laurent Canale, Institut de Recherche en Communications Optiques et Micro-Ondes, CNRS-Univ. de Limoges (France)


Published in SPIE Proceedings Vol. 5250:
Advances in Optical Thin Films
Claude Amra; Norbert Kaiser; H. Angus Macleod, Editor(s)

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