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Optica, Optics Express, 20(21), p. 23425, 2013

DOI: 10.1364/oe.21.023425

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Spectroscopic properties and diode end-pumped 2.79 μm laser performance of Er,Pr:GYSGG crystal

Journal article published in 2013 by Jiakang Chen, Huili Zhang, Dunlu Sun, Jianqiao Luo, Qingli Zhang, Renqin Dou, Shaotang Yin, Jingzhong Xiao ORCID, Jianqiao Luo,Huili Zhang Renqin Dou，Jingzhong Xiao Qingli Zhang Shaotang Yin Jiakang Chen， Dunlu Sun
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We demonstrate a 968 nm diode end-pumped Er,Pr:GYSGG (Gd1.17Y1.83Sc2Ga3O12) laser at 2.79 μm operated in the pulse and continuous-wave (CW) modes. The lifetimes for the upper laser level 4I11/2 and lower level 4I13/2 are 0.52 and 0.60 ms, respectively. The laser produces 284 mW of power in the CW mode, corresponding to the optical-to-optical efficiency of 14.8% and slope efficiency of 17.4%. The maximum laser energy achieved is 2.4 mJ at a repetition rate of 50 Hz and pulse duration of 0.5 ms, corresponding to a peak power of 4.8 W and slope efficiency of 18.3%. These results suggest that doping deactivator Pr3+ ions can effectively decrease the lower-level lifetime and improve the laser efficiency.