Influence of Cr3+ concentration on the spectroscopy and laser performance of Cr,Er:YSGG crystal

Zhongqing Fang; Dunlu Sun; Jianqiao Luo; Huili Zhang; Xuyao Zhao; Cong Quan; Maojie Cheng; Qingli Zhang; Shaotang Yin

doi:10.1117/1.OE.56.10.107111

30 October 2017 Influence of Cr³⁺ concentration on the spectroscopy and laser performance of Cr,Er:YSGG crystal

Zhongqing Fang, Dunlu Sun, Jianqiao Luo, Huili Zhang, Xuyao Zhao, Cong Quan, Maojie Cheng, Qingli Zhang, Shaotang Yin

Author Affiliations +

Funded by: National Key Research and Development Program of China, Natural Science Foundation of China, National Natural Science Foundation of China (NSFC), State Key Laboratory of Plused Power Laser Technology, Electronic Engineering Insititute

Optical Engineering, Vol. 56, Issue 10, 107111 (October 2017). https://doi.org/10.1117/1.OE.56.10.107111

Abstract

Cr,Er:YSGG ( Y3Sc2Ga3O12) crystals with 30 at. % Er3+ and two different concentrations of Cr3+ ions were grown by the Czochralski method. The spectra show the absorption coefficients at 450 and 654 nm and the fluorescence intensity at 2794 nm for 3 at. % Cr,Er:YSGG which are larger than those of 2 at. % Cr,Er:YSGG. A maximum pulse energy 1151.0 mJ operated at 5 Hz and 2.79 μm is obtained on the 3 at. % Cr,Er:YSGG crystal, corresponding to electrical-to-optical efficiency of 1.40%, slope efficiency of 1.71%, and threshold of 8.6 J. Under the same conditions, the values are 1029.8 mJ, 1.23%, 1.50%, and 12.6 J for 2 at. % Cr,Er:YSGG, respectively. Therefore, the 3 at. % Cr,Er:YSGG exhibits a larger output energy, higher laser efficiency, and lower pumping threshold. These results suggest that the laser performance of the Cr,Er:YSGG crystal can be improved by further optimizing the doping ions concentration and pumping parameters.

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Zhongqing Fang, Dunlu Sun, Jianqiao Luo, Huili Zhang, Xuyao Zhao, Cong Quan, Maojie Cheng, Qingli Zhang, and Shaotang Yin "Influence of Cr³⁺ concentration on the spectroscopy and laser performance of Cr,Er:YSGG crystal," Optical Engineering 56(10), 107111 (30 October 2017). https://doi.org/10.1117/1.OE.56.10.107111

Received: 27 July 2017; Accepted: 4 October 2017; Published: 30 October 2017

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