Journal of Fluorescence

, Volume 17, Issue 3, pp 301–307 | Cite as

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 

Notes

Acknowledgments

The authors would like to thank Mr. ZM Feng for technical assistance. This work is jointly supported by NSFC (50472053), NCET (04-0823) and GSTD (2006J1-C0491).

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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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