Transition Intensities and Excited State Relaxation Dynamics
of Tm³⁺ in Tm:PbF₂ Crystal¹

J. G. Yin^{a, b,} *, Y. Hang^a, X. H. He^a, L. H. Zhang^a, C. C. Zhao^{a, b},
E. Ma^c, J. Gong^{a, b}, and P. G. Zhang^{a, b}

^a Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Shanghai 201800, China

^b Graduate School of Chinese Academy of Sciences, Beijing 100039, China

^c Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou City,
Fujian Province 350002, China

*e-mail: yinjigango@126.com, yhang@siom.cn.com

Received October 18, 2011; in final form October 19, 2011; published online February 6, 2012

Abstract—High-quality Tm doped -PbF₂ crystal is grown by the Bridgman method in a nonvacuum atmo-
sphere. Optical absorption spectra were acquired and analysed in the framework of the Judd–Ofelt theory. Val-
ues of radiative transition rates and luminescence branching ratios calculated using phenomenological intensity
parameters were compared to corresponding experimental values derived from measurement of lumines-
cence spectra and decay curves. The emission cross–sections of the ³F₄ ³H₆ transitions of the Tm³⁺ ions at
1.86 m wavelengths were estimated by the use of the Fuchtbauer–Ladengurg method.

DOI: 10.1134/S1054660X12030279

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