Spectral Properties and 1.51.6 m Laser Operation
of Er:Yb:NaCe(WO₄)₂ Crystal¹

J. H. Huang, Y. J. Chen, X. H. Gong, Y. F. Lin, Z. D. Luo, and Y. D. Huang*

Key Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences,
Fuzhou, Fujian, 350002 China

*e-mail: huyd@fjirsm.ac.cn

Received August 16, 2011; in final form, August 22, 2011; published online November 28, 2011

Abstract—An Er:Yb:NaCe(WO₄)₂ crystal was grown by the Czochralski method. Spectral properties of the
crystal were investigated and compared with those of the Er:Yb:Ce:NaGd(WO₄)₂ crystal. The green up-conver-
sion was not observed when the Er:Yb:NaCe(WO₄)₂ crystal was excited by a diode laser at 970 nm. The effi-
ciency of energy transfer from Yb³⁺ to Er³⁺ in the Er:Yb:NaCe(WO₄)₂ crystal was calculated to be about 93%.
End-pumped by a diode laser at 970 nm in a hemispherical cavity, 0.95 W quasi-CW laser at 1.5–1.6m was
achieved in a 1.47-mm-thick c-cut Er:Yb:NaCe(WO₄)₂ crystal, the slope efficiency was 11%, and the threshold
was 2.83 W.

DOI: 10.1134/S1054660X12010069

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