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首页> 外文期刊>Thermal science >ANALYTICAL TREATMENT OF TRANSIENT TEMPERATURE AND THERMAL STRESS DISTRIBUTION IN CW END PUMPED LASER ROD: THERMAL RESPONSE OPTIMIZATION STUDY
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ANALYTICAL TREATMENT OF TRANSIENT TEMPERATURE AND THERMAL STRESS DISTRIBUTION IN CW END PUMPED LASER ROD: THERMAL RESPONSE OPTIMIZATION STUDY

机译：连续泵浦激光杆瞬态温度和热应力分布的解析处理：热响应优化研究

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摘要

The analytical solution of transient temperature distribution and Tresca failure stress in CW end- pumped laser rod has been derived using integral transform method. The analytical result is compared with numerical solutions presented by other works and good agreement has been found. Analytical solution with its clear physical meaning and its explicit form permits to predict the influence of various factors on the solution. The optical path difference which gives a valuable means to quantify the optical properties of laser material such as designed beam quality, will converge to a constant value as steady state temperature distribution is reached. One can obtain the dominate factors which affect the laser response to bring the laser rod to the thermal equilibrium; it has been found that fast response can be achieved by reducing pumping power, increasing extracted heat from the rod , choosing a crystal having high thermal diffusivity and decreasing laser rod radius while its volume remains constant. One final advantage of the analytical solution is that a fast result can be obtained where the numerical solution usually is a time consuming technique.
机译：利用积分变换的方法推导了连续抽运激光棒中瞬态温度分布和Tresca破坏应力的解析解。将分析结果与其他著作提供的数值解进行了比较，发现了很好的一致性。具有明确的物理意义和明确形式的分析解决方案可以预测各种因素对解决方案的影响。当达到稳态温度分布时，光程差将为量化激光材料的光学特性（例如设计的光束质量）提供有价值的手段，将收敛到一个恒定值。可以获得影响激光响应以使激光棒达到热平衡的主要因素。已经发现，可以通过降低泵浦功率，增加从棒中提取的热量，选择具有高热扩散率的晶体并减小激光棒半径同时保持其体积恒定来实现快速响应。分析解决方案的最后一个优势是可以快速获得结果，而数值解决方案通常是一项耗时的技术。

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