| 固体热容激光器与热稳态固体激光器温度场和应力场的比较研究 |
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| 引用本文： | 申永明,张耀飞,侯天晋,陈德章,卿光弼.固体热容激光器与热稳态固体激光器温度场和应力场的比较研究[J].强激光与粒子束,2006,18(11):1804-1808. |
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| 作者姓名： | 申永明 张耀飞 侯天晋 陈德章 卿光弼 |
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| 作者单位： | 1. 中国工程物理研究院 流体物理研究所, 四川 绵阳 621900;2. 中国北方自动控制技术研究所, 太原 030006; 3. 西南技术物理研究所, 成都 610041 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 建立了3维温度场及应力场模型，并采用有限元分析方法对Nd:YAG作为激活介质的固体热容激光器与热稳态固体激光器进行了对比研究。激光二极管阵列距离晶体3.5 mm，阵列功率2×4.2 kW，bar间隔0.4 mm，每bar发光面积为1 μm×5 mm，频率100 Hz，脉宽100 μs，Nd:YAG晶体初始温度20 ℃，冷却水温20 ℃。计算结果表明：热容模式激光介质的表面温度高于中心温度，稳态模式刚好相反, 稳态模式温差极值（19.8 ℃）是热容模式(6.4 ℃)的3.1倍,温度梯度极值(11.9 ℃/mm)是热容模式(2.46 ℃/mm)的4.8倍，热流密度极值(0.136 W/mm2)是热容模式(0.021 W/mm2))的6.4倍；稳态模式激光介质的表面出现张应力，中心出现压应力，热容模式则刚好相反，稳态模式压应力极值(18.27 MPa)是热容模式(12.1 MPa)的1.5倍，张应力极值(38.39 MPa)是热容模式(10.3 MPa)的3.9倍。由于晶体可以承受的压应力的破坏阈值远高于张应力，所以热容模式的固体激光器比稳态模式的固体激光器可以工作在更高的泵浦功率水平上。
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| 关 键 词： | 固体热容激光器 热稳态固体激光器 温度场 应力场 有限元分析 |
| 文章编号： | 1001-4322(2006)11-1804-05 |
| 收稿时间： | 2006-02-13 |
| 修稿时间： | 2006-09-18 |
Comparisons of temperature field and stress field between heat-capacity laser and solid steady state laser |
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| SHEN Yong-ming,ZHANG Yao-fei,HOU Tian-jin,CHEN De-zhang,QING Guang-bi.Comparisons of temperature field and stress field between heat-capacity laser and solid steady state laser[J].High Power Laser and Particle Beams,2006,18(11):1804-1808. |
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| Authors: | SHEN Yong-ming ZHANG Yao-fei HOU Tian-jin CHEN De-zhang QING Guang-bi |
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| Institution: | 1．Institute of Fluid Physics, CAEP, P.O.Box 919-113, Mianyang 621900, China;2. North Automatic Control Technology Institute, Taiyuan 030006, China;3. Southwest Technical Physics Research Institute, Chengdu 610041, China |
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| Abstract: | The temperature fields and stress fields of solid-state heat-capacity laser(SSHCL) and solid steady state laser were analyzed by finite-element analysis. The distance between LD arrays and laser crystal is 3.5 mm, LD array power 4 200 W×2, LD bars interval is 0.4 mm, While luminescence area 1 μm×5 mm, frequency 100 Hz, pulse width 100 μs, temperature of crystal and cooling water 20 ℃. The calculation reveals that the temperature on SSHCL surface is even higher than that in its interior, but the inverse phenomenon is found in solid steady state laser. The extremum temperature difference in solid steady state laser is 3.1 times than that in SSHCL, with there values being 19.8 ℃ and 6.4 ℃ respectively. The extremum temperature grads in solid steady state laser is 4.8 times than that in |
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| Keywords: | Solid-state heat-capacity laser(SSHCL) Solid steady state Laser Temperature field Stress field Finite-element analysis |
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