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热容模式下LD阵列泵浦Nd:GGG圆盘的温度场分析
引用本文: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):688-693.
作者姓名:王保松  江海河  张庆礼  孙敦陆  殷绍唐  李林峰  陶少宏
作者单位:中国科学院安徽光学精密机械研究所,安徽,合肥,230031
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3 cm,泵浦功率8100 W、脉冲频率500 Hz、脉冲宽度0.2 ms条件下泵浦4 s后圆盘的温度场以及变化曲线,得到4 s末的最大应力已经达到晶体断裂极限的47%.采用280 K、290 K的温度分别对圆盘进行背面冷却时,需要60~70 s左右的冷却时间;当采用280 K对圆盘进行背面和侧面同时冷却时,冷却时间缩短到30 s左右.

关 键 词:激光物理  温度场分析  格林函数法  Nd:GGG激光圆盘  热容模式
文章编号:1007-5461(2007)06-0688-06
收稿时间:2007/1/5
修稿时间:2007-01-05

Analysis on the temperature field of LD array pumped Nd:GGG disc laser in heat-capacity mode
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):688-693.
Authors:WANG Bao-song  JIANG Hai-he  ZHANG Qing-li  SUN Dun-lu  YIN Shao-tang  LI Lin-feng  TAO Shao-hong
Affiliation:Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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.
Keywords:laser physics  temperature field analysis  Green function method  Nd:GGG laser disc  heat-capacity mode
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