[1] LEE H C, BROWNLIE P L, MEISSNER H E, et al.. Diffusion-bonded composites of YAG single crystals ［J］. SPIE, 1991, 1624: 2-10.

[2] MIAO J G, WANG B SH, PENG J Y, et al.. Efficient diode-pumped passively Q-switched laser with Nd∶YAG/Cr∶YAG composite crystal ［J］. Optics & Laser Technology, 2008, 40(1): 137-141.

[3] TSUNEKANE M, TAIRA T. Long time operation of composite ceramic Nd∶YAG/Cr∶YAG micro-chip lasers for ignition［C］. Laser Ignition Conference, Optical Society of America, 2015: T4A.3.

[4] ZHU S Q, WANG S E, CHEN Z Q, et al.. High-power passively Q-switched 532 nm green laser by using Nd∶YAG/Cr4+∶YAG composite crystal ［J］. Laser Physics, 2012, 22(6): 1011-1014.

[5] JIANGW, ZHU S Q, CHEN X ZH, et al.. Compact passively Q-switched Raman laser at 1 176 nm and yellow laser at 588 nm using Nd3+∶YAG/Cr4+∶YAG composite crystal ［J］. Applied Optics, 2014, 53(7): 1328-1332.

[6] SONGJ, LI CH, UEDA K I. Thermal influence of saturable absorber in passively Q-switched diode-pumped cw Nd∶YAG/Cr4+∶YAG laser ［J］. Optics Communications, 2000, 177(1-6): 307-316.

[7] JIANG W, ZHU S, CHEN ZH Q, et al.. Green laser with v-shaped resonant cavity based on Nd∶YAG/Cr4+∶YAG/YAG composite crystal rod ［J］. Journal of Applied Spectroscopy, 2013, 80(5): 694-697.

[8] ZHU S Q, CHEN Z J, CHEN ZH Q, et al.. Diode-side-pumped passively Q-switched mode-locked 532 nm laser with a Nd∶YAG/Cr4+∶YAG/YAG composite crystal ［J］. Journal of Russian Laser Research, 2013, 34(6): 575-580.

[9] CHEN Z J, ZHU S Q, CHEN Y J, et al.. Comparison of passively Q-switched LD side-pumped green laser by using Nd3+∶YAG/Cr4+∶YAG/YAG composite crystals of different initial transmissions ［J］. Optics & Laser Technology, 2013, 54: 362-366.

[10] WANG S, ZHU S Q, CHEN ZH Q, et al.. High average power, side-pumped passively Q-switched laser of 1 064 nm by using composite crystal Nd∶YAG/Cr4+∶YAG/YAG ［J］. Journal of Optics, 2014, 43(3): 183-187.

[11] ZHU S Q, HE Q, WANG S, et al.. High average power passively Q-switched laser diode side-pumped green laser by using Nd∶YAG/Cr4+∶YAG/YAG composite crystal ［J］. Journal of Laser Applications, 2014, 26(3): 032009.

[12] ZHU S Q, CHEN Z J, CHEN ZH Q, et al.. A LD side-pumped deep ultraviolet laser at 266 nm by using a Nd∶YAG/Cr4+∶YAG/YAG composite crystal ［J］. Optics & Laser Technology, 2014, 63: 24-28.

[13] ZHU S Q, ZHOU H Q, JIANG W, et al.. Compact and efficient passively Q-switched laser at 473 nm with an Nd∶YAG/YAG/Cr4+∶YAG/YAG multifunctional composite crystal ［J］. Applied Optics, 2016, 55(15): 4166-4169.

[14] DONG J, DENG P ZH, LIU Y P, et al.. Passively Q-switched Yb∶YAG laser with Cr4+∶YAG as the saturable absorber ［J］. Applied Optics, 2001, 40(24): 4303-4307.

[15] BIBEAU C, BEACH R J, MITCHELL S C, et al.. High-average-power 1-μm performance and frequency conversion of a diode-end-pumped Yb∶YAG laser ［J］. IEEE Journal of Quantum Electronics, 1998, 34(10): 2010-2019.

[16] TSUNEKANE M, TAIRA T. High peak power, passively Q-switched Yb∶ YAG/Cr micro-lasers ［J］. IEEE Journal of Quantum Electronics, 2013, 49(5): 454-461.

[17] DONG J, REN Y Y, CHENG H H. >1 MW peak power, an efficient Yb∶YAG/Cr4+∶YAG composite crystal passively Q-switched laser ［J］. Laser Physics, 2014, 24(5): 055801.

[18] JIANG W, LIU Y M, CHEN W D, et al.. Composite Yb∶YAG/Cr4+∶ YAG/YAG crystal passively Q-switched lasers at 1030 nm ［J］. Applied Optics, 2015, 54(7): 1834-1838.

[19] YE P P, ZHU S Q, LI ZH, et al.. Passively Q-switched dual-wavelength green laser with an Yb∶ YAG/Cr4+∶YAG/YAG composite crystal ［J］. Optics Express, 2017, 25(5): 5179-5185.

[20] BRUESSELBACH H W, SUMIDA D S, REEDER R A, et al.. Low-heat high-power scaling using InGaAs-diode-pumped Yb∶YAG lasers ［J］. IEEE Journal of Selected Topics in Quantum Electronics, 1997, 3(1): 105-116.

[21] LACOVARA P, CHOI H K, WANG C A, et al.. Room-temperature diode-pumped Yb∶YAG laser ［J］. Optics Letters, 1991, 16(14): 1089-1091.

[22] 姚建铨, 徐德刚. 全固态激光及非线性光学频率变换技术 ［M］. 北京: 科学出版社, 2007: 652-659.

    YAO J Q, XU D G. All Solid State Laser and Nonlinear Optical Frequency Conversion Technology ［M］. Beijing: Science Press, 2007: 652-659. (in Chinese)

[23] KOERNER J, VORHOLT C, LIEBETRAU H, et al.. Measurement of temperature-dependent absorption and emission spectra of Yb∶ YAG, Yb∶ LuAG, and Yb∶CaF2 between 20 ℃ and 200 ℃ and predictions on their influence on laser performance ［J］. Journal of the Optical Society of America B, 2012, 29(9): 2493-2502.