Influence of boundary condition and pump scheme on thermal effects of laser crystal

Meng Peibei; Yan Fanjiang; Li Xu; Zheng Yongchao

The crystal's thermal effects under different thermal boundary and pump structure were reported. In theory, based on operating characters of space laser, a thermal model satisfying crystal working state was set up. The temperature distribution of Nd:YAG crystal was simulated for diode laser with Gaussian beam distribution side pumped laser, and the influence of thermal boundary condition, pump manner and pump parameters on thermal distribution was analyzed. With assumption that the thermal lens of crystal was thin lens, the thermal focal length was calculated theoretically and measured experimentally. With five-side annular pump structure, pump power of 4 500 W and pump repetition frequency of 10 Hz, the thermal focal length of Nd:YAG was about 9.5 m. Experimental results are in basic agreement with the simulated results.

1. Beijing Institute of Space Mechanics & Electricity,Beijing 100094,China

Received Date: 2015-03-07

Rev Recd Date: 2015-04-09

Publish Date: 2015-11-25

Key words:

Abstract: The crystal's thermal effects under different thermal boundary and pump structure were reported. In theory, based on operating characters of space laser, a thermal model satisfying crystal working state was set up. The temperature distribution of Nd:YAG crystal was simulated for diode laser with Gaussian beam distribution side pumped laser, and the influence of thermal boundary condition, pump manner and pump parameters on thermal distribution was analyzed. With assumption that the thermal lens of crystal was thin lens, the thermal focal length was calculated theoretically and measured experimentally. With five-side annular pump structure, pump power of 4 500 W and pump repetition frequency of 10 Hz, the thermal focal length of Nd:YAG was about 9.5 m. Experimental results are in basic agreement with the simulated results.

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[1]	Cavanaugh J F, Smith J C, Sun X, et al. The mercury laser altimeter instrument for the MESSENGER mission[J]. Space Sci Rev, 2007, 131: 451-479.
[2]	Yu A W, Shawa G B, Novo-Gradacb A M, et al. In space performance of the lunar orbiter laser altimeter(LOLA) laser transmitter[C]//SPIE, 2011, 8182: 818208.
[3]	Shi Xiangchun, Chen Weibiao, Hou Xia. Application of all solid state laser in space[J]. Infrared Laser Engineering, 2005, 34(2): 127-131. (in Chinese) 施翔春, 陈卫标, 侯霞. 全固体态激光技术在航天领域的应用[J]. 红外与激光工程, 2005, 34(2): 127-131.
[4]	Wu Dongjiang, Yin Bo, Zhou Qiuju, et al. Nd:YAG laser beam welding invar36 alloy sheet[J]. Optics and Precision Engineering, 2009, 17(3): 557-562. (in Chinese) 吴东江, 尹波, 周秋菊, 等. 用Nd:YAG激光焊接殷钢薄板材料[J]. 光学精密工程, 2009, 17(3): 557-562.
[5]	Li Long, Dong Wuwei, Shi Peng, et al. Thermal effect of diode bar side-pumped Nd:YAG slab[J]. Optics and Precision Engineering, 2008, 16(11): 2120-2126. (in Chinese) 李隆, 董武威, 史鹏, 等. 激光二极管阵列侧泵浦Nd:YAG板条的热效应[J]. 光学精密工程, 2008, 16(11): 2120-2126.
[6]	Chen Xinyu, Wang Di, Wang Chao, et al. Effect of Nd3+ doping concentration on the output characteristics of Nd:YAG laser without water-cool[J]. Infrared and Laser Engineering, 2011, 40(5): 817-821. (in Chinese) 陈薪羽, 王迪, 王超, 等. Nd3+掺杂浓度对无水冷Nd:YAG激光器输出特性的影响[J]. 红外与激光工程, 2011, 40(5):817-821.
[7]	Dai Mei, Jin Guangyong, Wang Chao, et al. 100 MW high peak power and high beam quality Nd:YAG laser[J]. Infrared and Laser Engineering, 2012, 41(3): 612-616. (in Chinese) 戴梅, 金光勇, 王超, 等. 100 MW级高峰值功率高光束质量Nd:YAG激光器[J]. 红外与激光工程, 2012, 41(3): 612-616.
[8]	Zhang Jian, Zhang Qingmao, Wu Ruihuan, et al. Design of Nd:YAG laser double-pass output time-sharing control system[J]. Chinese Journal of Optics, 2013,6(4): 529-535.(in Chinese) 张健, 张庆茂, 吴锐欢, 等. Nd:YAG脉冲激光器双光路输出分时控制系统的设计[J]. 中国光学, 2013, 6(4): 529-535.
[9]	Apollonov V V. High power lasers for space debris elimination[J]. Chinese Journal of Optics, 2013, 6(2): 187-195.(in Chinese) Apollonov V V. 用于空间碎片清除的高功率激光器[J]. 中国光学, 2013, 6(2): 187-195.
[10]	Kushina M E, Grote M G, Wiswall C E, et al. Clementine: diode-pumped laser qualification[C]//SPIE, 1995, 2379: 137-140.
[11]	Afzal R S. Performance of the GLAS laser transmitter[C]//SPIE, 2006, 6100: 610020.
[12]	Hovis F E. Qualification of the laser transmitter for the CALIPSO aerosol lidar mission[C]//SPIE, 2006, 6100: 61001X.
[13]	Chen Xinyu, Jin Guangyong, Yu Yongji, et al. Electro-optic Q-switched of double LDA alternate symmetric side-pumped Nd:YAG laser[J]. Acta Optica Sinica, 2009, 29(11): 3098-3102. (in Chinese) 陈薪羽, 金光勇, 于永吉, 等. 双激光二极管阵列侧面交错抽运的电光调Q Nd:YAG激光器[J]. 光学学报, 2009, 29(11): 3098-3102.
[14]	Walter K. Solid-state Laser Engineering[M]. Beijing: Sience Press, 2002. (in Chinese)
[15]	Qiao Liang, Hou Xia, Chen Weibiao. Thermal effect of Tm,Ho:LuLiF laser side-pumped by laser diode[J]. Chinese Journal of Lasers, 2009, 36(7): 1843-1847. (in Chinese) 乔亮, 侯霞, 陈卫标. 激光二极管侧面抽运Tm, Ho:LuLiF激光器的热效应[J]. 中国激光, 2009, 36(7): 1843-1847.

Influence of boundary condition and pump scheme on thermal effects of laser crystal

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