Hugo Costa, Dawei Liang, Joana Almeida, Miguel Catela, Dário Garcia, Bruno D. Tibúrcio, Cláudia R. Vistas
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引用次数: 0
摘要
提高tem00模式激光效率是太阳能激光研究的主要目标之一,这是因为这些高质量光束在材料加工等领域具有重要意义。设计了一个七杆概念,通过采用Ce:Nd:YAG有源介质来提高tem00模式太阳能激光器的效率。太阳光线的收集和集中由7个菲涅耳透镜和6个折叠镜辅助进行。激光头由7个非球面透镜、一个六角形窗口和7根端侧泵浦的凹槽Ce:Nd:YAG棒组成。在数值上实现了tem00模式的总激光功率为172.59 W,对应于34.52 W / m2的收集效率和3.63%的太阳能-激光功率转换效率。这些效率值比之前的数值研究高出1.51和1.59倍,这些数值研究也涉及使用凹槽Ce:Nd:YAG棒。提出了一种激光光束合并方案,实现了从七个棒中提取单个tem00模式激光束。获得了207.55 W的tem00模式激光功率,对应的收集和太阳能-激光功率转换效率分别为41.51 W / m2和4.37%。
Seven-grooved-Ce:Nd:YAG-rod solar laser pumping approach with 34.5 W/m2 TEM00-mode collection efficiency
Improving the TEM00-mode laser efficiency is one of the main goals in solar laser research, motivated by the significant importance these high-quality beams hold for fields, such as materials processing. A seven-rod concept was designed to enhance the TEM00-mode solar laser efficiency through the adoption of Ce:Nd:YAG active media. Collection and concentration of solar rays were conducted by seven Fresnel lenses, assisted by six folding mirrors. The laser head was composed of seven aspheric lenses, a hexagonal window and seven grooved Ce:Nd:YAG rods, which were end-side-pumped. A total TEM00-mode laser power of 172.59 W was numerically achieved, corresponding to a 34.52 W / m2 collection efficiency and a 3.63% solar-to-laser power conversion efficiency. These efficiency values were 1.51 and 1.59 times higher than those from the previous numerical study that also involved the usage of a grooved Ce:Nd:YAG rod. A laser beam merging scheme is also presented, enabling the extraction of a single TEM00-mode laser beam from the seven rods. A TEM00-mode laser power of 207.55 W was attained, corresponding to collection and solar-to-laser power conversion efficiencies of 41.51 W / m2 and 4.37%, respectively.
期刊介绍:
The Journal of Photonics for Energy publishes peer-reviewed papers covering fundamental and applied research areas focused on the applications of photonics for renewable energy harvesting, conversion, storage, distribution, monitoring, consumption, and efficient usage.