Journal of Fluorescence

, Volume 17, Issue 3, pp 301–307

Mid-Infrared Emission Characteristic and Energy Transfer of Ho3+-Doped Tellurite Glass Sensitized by Tm3+

  • G. X. Chen
  • Q. Y. Zhang
  • G. F. Yang
  • Z. H. Jiang
Original Paper

Abstract

We report on 2.0-μm emission characteristic and energy transfer of Ho3+-doped tellurite glass sensitized by Tm3+ upon excitation of a conventional 808 nm laser diode. The Judd-Ofelt strength parameters, spontaneous radiative transition probabilities and radiative lifetime of Ho3+ have been calculated from the absorption spectra by using the Judd-Ofelt theory. Significant enhancement of 2.0-μm emission of Ho3+ has been observed with increasing Tm3+ doping up to 0.7 mol%. The energy transfer coefficient of the forward Tm3+→Ho3+ is approximately 17 times larger than that of the backward Tm3+←Ho3+ energy transfer. Our result indicates that the maximum gain of 2.0-μm emission, assigned to the transition of 5I75I8 of Ho3+, might be achieved from the tellurite glass at the concentration of 0.5 mol% of Tm2O3 and 0.15 mol% of Ho2O3. The high gain coefficient and quantum efficiency (1.16) along with the large value of the product of the stimulated emission cross-section and the measured radiative lifetime (4.12×10−27 m2s) of the Ho3+/Tm3+-codoped tellurite glasses might find potential applications in efficient 2.0-μm laser.

Keywords

Mid-infrared laser Fluorescence Energy transfer Gain Tellurite glass 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • G. X. Chen
    • 1
  • Q. Y. Zhang
    • 1
  • G. F. Yang
    • 1
  • Z. H. Jiang
    • 1
  1. 1.Key Lab of Specially Function Materials of Ministry of Education, and Institute of Optical Communication MaterialsSouth China University of TechnologyGuangzhouP. R. China

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