Improvement of 2.79-μm laser performance on laser diode side-pumped GYSGG/Er,Pr:GYSGG bonding rod with concave end-faces<xref rid="cpb_28_11_114208_fn1" ref-type="fn">*</xref><fn id="cpb_28_11_114208_fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 51872290, 51702322, and 51802307) and the National Key Research and Development Program of China (Grant No. 2016YFB1102301).</p></fn>

Improvement of 2.79-μm laser performance on laser diode side-pumped GYSGG/Er,Pr:GYSGG bonding rod with concave end-faces**

Project supported by the National Natural Science Foundation of China (Grant Nos. 51872290, 51702322, and 51802307) and the National Key Research and Development Program of China (Grant No. 2016YFB1102301).

Zhao Xu-Yao^{1, 2}, Sun Dun-Lu^{1, †}, Luo Jian-Qiao¹, Zhang Hui-Li¹, Fang Zhong-Qing^{1, 2}, Quan Cong^{1, 2}, Hu Lun-Zhen^{1, 2}, Han Zhi-Yuan^{1, 2}, Cheng Mao-Jie¹, Yin Shao-Tang¹

Thermal focal lengths versus input power for three different crystals.