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热容模式下LD阵列泵浦Nd∶GGG圆盘的温度场分析

Analysis on the temperature field of LD array pumped Nd∶GGG disc laser in heat-capacity mode

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摘要

为了研究Nd∶GGG激光晶体圆盘在热容运行模式下的温度场分布及变化问题,根据实际情况建立物理模型进行了分析。从热传导微分方程出发,通过格林函数法求得激光器工作、冷却阶段晶体内部温度场的解析解,在一定程度上可以反映温度场的变化情况。数值计算了矩形LD光斑尺寸3cm,泵浦功率8100W、脉冲频率500Hz、脉冲宽度0.2ms条件下泵浦4s后圆盘的温度场以及变化曲线,得到4s末的最大应力已经达到晶体断裂极限的47%。采用280K、290K的温度分别对圆盘进行背面冷却时,需要60~70s左右的冷却时间;当采用280K对圆盘进行背面和侧面同时冷却时,冷却时间缩短到30s左右。

Abstract

A physical model was established to study the distribution and change of temperature field of Nd∶ GGG disc operated under heat-capacity mode. By using heat conducting equation and Green function,the expressions of temperature field inside the crystal were obtained during the operation and cooling period of the laser;the obtained data reflect the change of temperature filed. The temperature field was calculated after the crystal was pumped as long as 4 s under the pump conditions(rectangular LD facula 3 cm,power 8.1 kW,frequency 500 Hz,width 0.2 ms),and the maximal stress is up to 47% of the crystal rupture limit at the end of 4 s. The cooling time is about 60~70 s when the back of the disc is cooled at the temperature 280 K and 290 K respectively;the cooling time is shorted to be about 30 s when both the back and side of disc were cooled at the temperature 280 K.

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中图分类号:TN248.1

所属栏目:激光技术与器件

基金项目:国家自然科学基金(60478025,50472104)资助课题

收稿日期:2007-01-05

修改稿日期:2007-01-25

网络出版日期:0001-01-01

作者单位    点击查看

王保松:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
江海河:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
张庆礼:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
孙敦陆:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
殷绍唐:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
李林峰:中国科学院安徽光学精密机械研究所,安徽 合肥 230031
陶少宏:中国科学院安徽光学精密机械研究所,安徽 合肥 230031

联系人作者:王保松(wbs6268@yahoo.com.cn)

备注:江海河|男|研究员|主要从事激光物理、激光技术、光电测量等方面的研究|(1961-)

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引用该论文

WANG Bao-song,JIANG Hai-he,ZHANG Qing-li,SUN Dun-lu,YIN Shao-tang,LI Lin-feng,TAO Shao-hong. Analysis on the temperature field of LD array pumped Nd∶GGG disc laser in heat-capacity mode[J]. Chinese Journal of Quantum Electronics, 2007, 24(6): 0688

王保松,江海河,张庆礼,孙敦陆,殷绍唐,李林峰,陶少宏. 热容模式下LD阵列泵浦Nd∶GGG圆盘的温度场分析[J]. 量子电子学报, 2007, 24(6): 0688

被引情况

【1】李冬青,丁丽华,张庆礼,邵淑芳,宁凯杰,殷绍唐. 尿素共沉淀法制备Nd:YAG纳米粉体. 量子电子学报, 2010, 27(1): 110-115

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