30 October 2017 Influence of Cr3+ concentration on the spectroscopy and laser performance of Cr,Er:YSGG crystal
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Abstract
Cr,Er:YSGG ( Y 3 Sc 2 Ga 3 O 12 ) crystals with 30 at. % Er 3 + and two different concentrations of Cr 3 + 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    μ m 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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhongqing Fang, Zhongqing Fang, Dunlu Sun, Dunlu Sun, Jianqiao Luo, Jianqiao Luo, Huili Zhang, Huili Zhang, Xuyao Zhao, Xuyao Zhao, Cong Quan, Cong Quan, Maojie Cheng, Maojie Cheng, Qingli Zhang, Qingli Zhang, Shaotang Yin, 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 . Submission: Received: 27 July 2017; Accepted: 4 October 2017
Received: 27 July 2017; Accepted: 4 October 2017; Published: 30 October 2017
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