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Proceedings Article

Optical damage and photoconductivity in iron-doped lithium niobate crystals

[+] Author Affiliations
B. Chikh-Bled

Univ. Paul Verlaine of Metz and Supelec (France) and Univ. Abou Bekr Belkaid Tlemcen (Algeria)

M. Aillerie

Univ. Paul Verlaine of Metz and Supelec (France)

S. Kostritskii

RPC Optolink, Zelenograd (Russian Federation)

E. Kokanyan

Institute for Physical Research (Armenia)

B. Benyoucef

Univ. Abou Bekr Belkaid Tlemcen (Algeria)

Proc. SPIE 7998, International Conference on Laser Physics 2010, 799808 (March 04, 2011); doi:10.1117/12.890921
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From Conference Volume 7998

  • International Conference on Laser Physics 2010
  • Aram V. Papoyan
  • Ashtarak, Armenia | October 12, 2010

abstract

Photorefractive damage and photoconductivity in as-grown, reduced and oxidized iron doped lithium niobate (LiNbO3, LN) crystals, in two series of samples with 0.03 and 0.05 wt% iron concentrations, respectively have been studied with the closed-aperture Z-scan technique. The photoconductivity in the various crystals was directly deduced from the dynamic distortion of the beam spot of a red laser light passing throughout the sample, placed at the focal point, followed by a pin-hole and recording in the far field zone behind the crystal. The most important experimental result points out a non-linear increase of the photoconductivity with the laser power density and with the iron concentration in the crystal. To explain these experimental findings, we use the theoretical model taking into account the photoionization of iron ions and intrinsic defects, namely polarons, bipolarons and hole polarons.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

B. Chikh-Bled ; M. Aillerie ; S. Kostritskii ; E. Kokanyan and B. Benyoucef
"Optical damage and photoconductivity in iron-doped lithium niobate crystals", Proc. SPIE 7998, International Conference on Laser Physics 2010, 799808 (March 04, 2011); doi:10.1117/12.890921; http://dx.doi.org/10.1117/12.890921


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