Emission and absorption cross-sections of Mg/Er-codoped near-stoichiometric LiNbO3crystals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • De-Long Zhang
  • Jian Gao
  • Juan-Antonio Vallés
  • Chao Xu
  • Liang Sun
  • Yu-Heng Xu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number5518512
Pages (from-to)1332-1341
Journal / PublicationIEEE Journal of Quantum Electronics
Volume46
Issue number9
Publication statusPublished - 2010

Abstract

Near-stoichiometric (NS) (Mg:) LiNbO3crystals crystals were grown from melts (Li2O]n}[Nb2O5]=1:1) containing 0.0/0.5, 0.5/0.5, and 1.0/0.5 mol%/mol% MgO/Er2O 3. OH absorption study shows that the optical damage threshold Mg concentration of the Er/Mg-codoped NS crystal is just near 1.0 mol%. Polarized visible and near infrared, and unpolarized mid-infrared (2. 7μ4I11/24 13/2) emission spectra of Er3+ ion in these crystals were measured. From measured emission spectra, the emission and absorption cross-section spectra were calculated based upon McCumber theory, and compared with the data of congruent Er:LiNbO3 bulk material and/or Ti-diffused Er:LiNbO3 strip waveguide and the results obtained from the direct unpolarized optical absorption measurements. The 550, 980, and 1530 nm emission lifetimes were also measured, and compared with the Judd-Ofelt theoretical values and the measured values of the congruent material. The results show that the polarized absorption cross-section data derived from the emission spectra are comparable to the unpolarized cross-section data from direct absorption measurements. The emission and absorption cross-sections, their polarization dependences as well as the lifetime all change definitely as the crystal composition shifts from the congruent point to the near-stoichiometry. In the NS crystal, the Er 3+ ion has smaller emission and absorption cross-sections, and longer lifetimes. In contrast, MgO codoping has less effect on the emission and absorption cross-sections, and lifetime. © 2006 IEEE.

Research Area(s)

  • emission and absorption cross-sections, near-stoichiometric LiNbO 3crystalscrystal, photorefractive effect

Citation Format(s)

Emission and absorption cross-sections of Mg/Er-codoped near-stoichiometric LiNbO3crystals. / Zhang, De-Long; Gao, Jian; Vallés, Juan-Antonio; Xu, Chao; Sun, Liang; Xu, Yu-Heng; Pun, Edwin Yue-Bun.

In: IEEE Journal of Quantum Electronics, Vol. 46, No. 9, 5518512, 2010, p. 1332-1341.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review