LD单端泵浦变热导率Nd∶YAG圆棒热容激光器温度场
发布时间：2018-07-17 15:32
【摘要】：针对圆棒激光晶体的实际工作情况进行分析研究,以热容激光器的运行模式为依据,从经典热传导方程出发,分别建立泵浦阶段、冷却阶段的热传导模型。然后引入变热传导系数对方程进行求解,分别得到LD单端泵浦和冷却时热容激光器温度场的表达式。同时分析并对比了不同因素,如光斑半径、泵浦时间对晶体温度场的影响。计算结果表明:使用脉冲激光对晶体进行泵浦时,将Nd∶YAG晶体的热导率视为常量和变量的情况下,该晶体在泵浦端面获得的最大温升分别为164.84℃、195.58℃。此时激光光斑半径为800μm,泵浦功率为60W、超高斯阶次为3;该激光晶体的尺寸为Ф20 mm×10 mm,掺钕离子为1.0 at%,吸收系数是0.91 mm~(-1)。计算分析结果对LD泵浦固体热容激光器谐振腔的设计具有借鉴意义。
[Abstract]:In view of the actual working situation of the circular rod laser crystal, based on the operation mode of the heat capacity laser, the heat conduction model of the pump stage and the cooling stage is set up separately from the classical heat conduction equation. Then the equation is solved by introducing the thermal conductivity coefficient, and the LD single end pump and cooling heat capacity laser are obtained respectively. The effect of different factors, such as the radius of the spot and the pump time on the temperature field of the crystal, is analyzed and compared. The results show that the maximum temperature rise of the crystal at the end of the pump is 164.8 when the thermal conductivity of the Nd: YAG crystal is considered as constant and variable when the crystal is pumped by a pulsed laser. At 4, 195.58 C, the laser spot radius is 800 mu m, the pump power is 60W, the super Gauss order is 3, the size of the laser crystal is 20 mm x 10 mm, the nd ion is 1 at% and the absorption coefficient is 0.91 mm~ (-1). The calculation analysis results can be used for reference for the design of the LD pumped solid heat capacity laser resonator.
【作者单位】： 西安建筑科技大学理学院;
【基金】：陕西省自然科学青年基础研究基金项目(No.2014JQ1008)资助
【分类号】：TN248
[Abstract]:In view of the actual working situation of the circular rod laser crystal, based on the operation mode of the heat capacity laser, the heat conduction model of the pump stage and the cooling stage is set up separately from the classical heat conduction equation. Then the equation is solved by introducing the thermal conductivity coefficient, and the LD single end pump and cooling heat capacity laser are obtained respectively. The effect of different factors, such as the radius of the spot and the pump time on the temperature field of the crystal, is analyzed and compared. The results show that the maximum temperature rise of the crystal at the end of the pump is 164.8 when the thermal conductivity of the Nd: YAG crystal is considered as constant and variable when the crystal is pumped by a pulsed laser. At 4, 195.58 C, the laser spot radius is 800 mu m, the pump power is 60W, the super Gauss order is 3, the size of the laser crystal is 20 mm x 10 mm, the nd ion is 1 at% and the absorption coefficient is 0.91 mm~ (-1). The calculation analysis results can be used for reference for the design of the LD pumped solid heat capacity laser resonator.
【作者单位】： 西安建筑科技大学理学院;
【基金】：陕西省自然科学青年基础研究基金项目(No.2014JQ1008)资助
【分类号】：TN248
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