Abstract

A compact side-pumped solar laser design is proposed to improve the TEM₀₀-mode solar laser output performance substantially. A double-stage secondary concentrator was composed of a rectangular hollow pipe and a 2V-shaped dry pump cavity, which couples and redistributes the concentrated solar radiation from the focal zone of a 2 m diameter parabolic mirror into a grooved Nd:YAG rod. The solar laser performance was numerically optimized by both ZEMAX^® and LASCAD^TM software. Maximum TEM₀₀-mode solar laser power of 32 W was numerically calculated for a 4.5 mm diameter, 34 mm length grooved Nd:YAG rod, corresponding to 10.7 W/m² collection efficiency. This value is 1.25 times more than the numerical record. Laser beam brightness figure of merit of 31.4 W was numerically attained, which is 1.84 times more than the numerical record. The proposed laser head scheme has a simple and compact design, as compared to previous schemes. Good TEM₀₀-mode solar laser thermal performance was also numerically demonstrated.

中文翻译：

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32 W TEM 00-模式侧面泵浦太阳能激光器设计

摘要

提出了一种紧凑的侧面泵浦太阳能激光器设计，以实质上改善TEM ₀₀模式太阳能激光器的输出性能。二级二次聚光器由一个矩形空心管和一个2V形干泵腔组成，该腔将直径2 m的抛物面反射镜的焦点区聚集的太阳辐射耦合并重新分布到带凹槽的Nd：YAG杆中。太阳能激光性能进行了数值都ZEMAX优化^®和LASCAD ^TM软件。对于直径为4.5毫米，长度为34毫米的带槽Nd：YAG棒，通过数值计算得出了32 W的最大TEM ₀₀模式太阳激光功率，对应于10.7 W / m ^2。收集效率。该值是数字记录的1.25倍。数值计算得到的激光束亮度品质因数为31.4 W，是数值记录的1.84倍。与先前的方案相比，所提出的激光头方案具有简单且紧凑的设计。还数值证明了良好的TEM ₀₀模式太阳激光热性能。