Nonlinear Optical Effects In Surface Crystallized 0.50TeO2–0.50 LiNbO3 Glasses

  • M. V. Shankar
  • K. B. R. Varma

Abstract

Ever since, Borrelli1 has reported the fabrication of transparent glass-ceramics composed of ferroelectric NaNbO3 crystals, glasses and glass-ceramics have been considered as potential candidates for a variety of NLO applications. TeO2-based glasses containing ferroelectric crystals have emerged as promising candidates for nonlinear optical (NLO) applications, in the recent past. Transparent TeO2 glasses containing the crystalline phase of ferroelectric LiNbO3, have been fabricated. Since, the refractive-indices of TeO2-based glasses and LiNbO 3 crystal are compatible, the scattering losses at the glass-crystal interface is considerably small, thereby making these glasses ideal candidates for optical applications. Komatsu and co-workers2, based on their studies on the crystallization behaviour of TeO2-Li2O-Nb2O5 glasses, proposed the possibility of the fabrication of transparent TeO2-based glasses containing ferroelectric LiNbO3 microcrystallites. But the difficulty encountered, in fabricating transparent TeO2-based glasses containing ferroelectric LiNbO3 crystals, is the precipitation of an undesired non-transparent pyrochlore phase. Subsequently, Kim et al 3 reported the crystallization of LiNbO3 in TeO2-Li20-Nb205 glasses (with high Li+ content), by a two-step heat-treatment process. They have also prepared transparent tellurite glasses containing LiNbO3 crystals using an incorporation4 method in which LiNbO3 crystals have been directly dispersed in glasses of the composition 80 TeO2–15 Li2O–5Nb2O5. Since a variety of applications of these glasses are foreseen, a detailed investigation into TeO2-LiNbO3 glass-ceramics is imperative.

Keywords

Differential Thermal Analysis Second Harmonic Genus LiNbO3 Crystal Incorporation4 Method Differential Thermal Analysis Trace 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    N.F. Borrelli, “Electro-optic effect in transparent niobate glass-ceramic system,” J. Appl. Phys. 38, 11: 4243(1967).CrossRefGoogle Scholar
  2. 2.
    T. Komatsu, H. Tawarayama, H. Mohri and K. Matusita “Properties and crystallisation behaviour of TeO2-LiNbO3 glasses,” J. Non-Cryst. Solids 135: 105 (1991).CrossRefGoogle Scholar
  3. 3.
    H.G. Kim, T. Komatsu, R. Sato and K. Matusita “Crystallisation of LiNbO3 crystals,” J. Non-Cryst. Solids 162:201(1993).CrossRefGoogle Scholar
  4. 4.
    H.G. Kim, T. Komatsu, R. sato and K. Matusita “Incorporation of LiNbO3 crystals into tellurite glasses,” J. Mater. Sci. 31: 2159 (1996).CrossRefGoogle Scholar
  5. 5.
    Thornburg D.D, “Evaluation of glass formation tendency from rate dependent thermograms” Mat. Res. Bull. 9: 1481(1974).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • M. V. Shankar
    • 1
  • K. B. R. Varma
    • 1
  1. 1.Materials Research CentreIndian Institute of ScienceBangaloreIndia

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