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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 53,
  • Issue 11,
  • pp. 1454-1458
  • (1999)

Thermal Dependence of the Cr-to-Nd Energy Transfer in Lanthanum Lutetium Gallium Garnet

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Abstract

Photoluminescence, excitation, and response to pulsed excitation measurements show the existence of the Cr<sup>3+</sup>-to-Nd<sup>3+</sup> energy transfer in lanthanum lutetium gallium garnet with an efficiency eta = 0.59 at room temperature. The transfer occurs radiatively and nonradiatively, and both transfer rates are temperature dependent within 15-550 K. The nonradiative transfer rate, calculated as a function of temperature by using the lifetime data of the Cr<sup>3+</sup> ion in the crystal, increases slowly with increasing temperature.

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