[1] Huang Lilei, Wang Yanqi, Chen Jiqin et al.. Energy transfer of Er3+ and Cr3+ to Tm3+ ion in YAG crystals［J］. Acta Optica Sinica, 1994, 14(9): 931～935

[2] Wang Li, Wu Xianyou, Li Zhe et al.. Progress of the nonlinear crystal and device of the mid-infrared optical parametric oscillator［J］. Laser Technology, 2011, 35(4): 433～439

[3] Yan Lianshan, Zhang Shiwen. Polarized combination of high power laser beams［J］. Laser & Infrared, 2000, 30(2): 81～83

[4] Laser Crystals Reaserach Group, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences. Thermally induced birefringence in YAG rods in the [001] direction［J］. Acta Physica Sinica, 1977, 26(2): 93～99

[5] Ou Qunfei, Chen Jianguo, Feng Guoying et al.. Analyses of thermal depolarization in ring laser diode array side-pumped rod layer［J］. Chinese J. Lasers, 2004, 31(7): 797～801

[6] Chen Lin, Hou Xia, Lu Yutian. Analog calculation and evaluation of LDA direct side-pumping［J］. Acta Optica Sinica, 2002, 22(7): 825～828

[7] Zhang Xiang, Su Likun, Cai Qing. Analysis of thermal effect and experimental test of beam wavefront aberration in all solid-state NdYAG laser［J］. Acta Optica Sinica, 2010, 30(3): 802～807

[8] S. Z. Kurtev, O. E. Denchev, S. D. Savov. Effects of thermally induced birefringence in high-output-power electro-optically Q-switched NdYAG lasers and their compensation［J］. Appl. Opt., 1993, 32(3): 278～285

[9] B. Ozygus, Q. Zhang. Thermal lens determination of end-pumped solid-state lasers using primary degeneration modes［J］. Appl. Phys. Lett., 1997, 71(18): 2590～2592

[10] W.Koechner. Thermal lensing in a NdYAG laser rod［J］. Appl. Opt., 1970, 9(11): 2548～2553

[11] Guo Ruixiang, Li Fengqin, Xie Changde et al.. Method for indirect measuring thermic focal length of laser crystalline［J］. Chinese J. Lasers, 2001, 28(8): 721～724

[12] Yuanbin Wang, Baoshan Wang, Yong Bo et al.. High efficiency, high power QCW diode-side-pumped NdYAG ceramic laser at 1064 nm based on domestic ceramic［J］. Chin. Opt. Lett., 2010, 8(12): 1144～1146

[13] Pan Sunqiang, Liu Chong, Zhao Zhigang et al.. Thermal effects and thermal focal length measurement of laser diode end-pumped solid-state lasers［J］. Chinese J. Lasers, 2010, 37(10): 2445～2450

[14] Zheng Yaohui, Wang Yajun, Peng Kunchi. Thermal lens determination in solid-state laser by using astigmatic cavity［J］. Chinese J. Lasers, 2011, 38(9): 0908006

[15] Geng Aicong, Zhao Ci, Bo Yong et al.. A method for measuring thermal focal length of LD side pumped laser crystal［J］. Acta Physica Sinica, 2008, 57(11): 6987～6991

[16] W.Koechner. Solid-State Laser Engineering［M］. Sun Wen Transl.. Beijing:Science Press, 2002. 184～186