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

Authors: Jiakang Chen, Dunlu Sun, Jianqiao Luo, Huili Zhang, Renqin Dou, Jingzhong Xiao, Qingli Zhang, and Shaotang Yin

Ref.: OPTICS EXPRESS 21, 23425-23432 (2013)

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.

DOI: 10.1364/OE.21.023425