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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 12 — Jun. 14, 2004
  • pp: 2754–2761

Reverse-proton-exchange in stoichiometric lithium tantalate

M. Marangoni, R. Osellame, R. Ramponi, S. Takekawa, M. Nakamura, and K. Kitamura  »View Author Affiliations

Optics Express, Vol. 12, Issue 12, pp. 2754-2761 (2004)

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Buried waveguides with nearly symmetrical refractive index profile and high homogeneity were obtained by applying the reverse-proton-exchange technique to MgO doped stoichiometric lithium tantalate, a promising nonlinear material due to its low coercive field and high damage threshold. By characterizing several samples fabricated under different experimental conditions, we identified a fabrication procedure in which the annealing and the reverse-exchange processes are performed at the same temperature, and the diffusion of hydrogen ions towards the substrate is negligible during the burial step. These fabrication conditions are simpler than the conventional ones used for lithium niobate. Accurate empirical laws were found, relating the fabrication conditions to the optical parameters.

© 2004 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3130) Integrated optics : Integrated optics materials
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(230.4320) Optical devices : Nonlinear optical devices
(230.7370) Optical devices : Waveguides
(310.3840) Thin films : Materials and process characterization

ToC Category:
Research Papers

Original Manuscript: April 20, 2004
Revised Manuscript: June 3, 2004
Published: June 14, 2004

Marco Marangoni, R. Osellame, R. Ramponi, S. Takekawa, M. Nakamura, and K. Kitamura, "Reverse-proton-exchange in stoichiometric lithium tantalate," Opt. Express 12, 2754-2761 (2004)

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