Optical waveguides in LiNbO3 and stoichiometric LiNbO3 crystals by proton exchange

  • ShiLing Li
Article

Abstract

The formation of optical planar waveguides in LiNbO3 and stoichiometric LiNbO3 crystals by proton exchange was reported. The prism-coupling method was used to characterize the dark-line spectroscopy at the wavelength of 633 and 1539 nm, respectively. The mode optical near-field outputs from proton-exchanged LiNbO3 and SLN waveguides at 633 nm were presented. The mode field from stoichiometric LiNbO3 (SLN) waveguide is lighter and more uniform than that from LiNbO3 waveguide, which means the quality of the waveguide in SLN crystal is better than that of the LiNbO3 waveguide. For proton-exchanged LiNbO3 waveguides, the evolution of the refractive index profile with annealing was presented. The disorder profiles of Nb atoms in proton-exchanged LiNbO3 waveguides were obtained by Rutherford backscattering/channeling technique. It is shown that the longer the exchange time, the larger the displacement of Nb atoms.

Keywords

optical waveguide proton exchange LiNbO3 crystal stoichiometric LiNbO3 crystal 

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References

  1. 1.
    Jackel J L, Rice C E, Veselka J J. Proton exchange for high-index waveguide in LiNbO3. Appl Phys Lett, 1982, 41(7): 607–608CrossRefADSGoogle Scholar
  2. 2.
    Canali C, Camera A, Mea G D, et al. Structural characterization of proton exchanged LiNbO3 optical waveguides. J Appl Phys, 1986, 58(8): 2643–2649CrossRefADSGoogle Scholar
  3. 3.
    Paz-Pujalt G R, Tuschel D D, Braunstein G, et al. Characterization of proton exchange lithium niobate waveguides. J Appl Phys, 1994, 76(7): 3981–3987CrossRefADSGoogle Scholar
  4. 4.
    Zavada J M, Novak S W, Loni A. Correlation of substitutional hydrogen to refractive index profiles in annealed proton-exchanged Z-and X-cut LiNbO3. J Appl Phys, 1995, 77(6): 2697–2708CrossRefADSGoogle Scholar
  5. 5.
    Howerton M M, Burns W K, Skeath P R, et al. Dependence of refractive index on hydrogen concentration in proton exchanged LiNbO3. IEEE J Quant Electr, 1991, 27(3): 593–601CrossRefADSGoogle Scholar
  6. 6.
    Méndez A, Dela Paliza G, García-Cabaňes A, et al. Comparison of the electro-optic coefficient r33 in well-defined phases of proton exchanged LiNbO3 waveguides. Appl Phys B, 2001, 73: 485–488ADSGoogle Scholar
  7. 7.
    Zhang D L, Ding G L, Cui Y M, et al. Proton-exchanged LiNbO3 optical waveguide (in Chinese). Prog Phys, 2001, 21(1): 45–65Google Scholar
  8. 8.
    Jackel J L, Rice C E, Vesekka J J. Composition control in proton-exchanged LiNbO3. Electron Lett, 1983, 19: 387–388CrossRefGoogle Scholar
  9. 9.
    Wohlecke M, Corradi G, Betzler K. Optical methods to characterize the composition and homogeneity of lithium niobate single crystals. Appl Phys B, 1996, 63: 323–330CrossRefADSGoogle Scholar
  10. 10.
    Ramponi R, Marangoni M, Osellame R. Dispersion of the ordinary refractive-index change in a proton-exchanged LiNbO3 waveguide. Appl Phys Lett, 2001, 78(15): 2098–2100CrossRefADSGoogle Scholar
  11. 11.
    EI Hadi K, Rastogi V, Shenoy M R, et al. Spectral measurement of the film-substrate index difference in proton-exchanged LiNbO3 waveguides. Appl Opt, 1998, 37: 6463–6467CrossRefADSGoogle Scholar

Copyright information

© Science in China Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • ShiLing Li
    • 1
    • 2
  1. 1.College of Physics and EngineeringQufu Normal UniversityQufuChina
  2. 2.School of Physics and MicroelectronicsShandong UniversityJinanChina

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