Costa Hugo, Liang Dawei, Almeida Joana, Tibúrcio Bruno D, Vistas Cláudia R
Department of Physics, Centre of Physics and Technological Research, NOVA School of Science and Technology, 2829-516, Caparica, Portugal.
Sci Rep. 2025 Apr 17;15(1):13354. doi: 10.1038/s41598-025-96239-5.
The development of solar laser systems that combine high efficiency and cost-effectiveness is key to the practical implementation of this renewable technology. This paper presents the outcomes of the assessment of a solar laser prototype performed in the focal zone of a Fresnel lens, where it successfully emitted four laser beams at the same time. It featured an aspheric lens, a conical pump cavity, and four Ce:Nd:YAG rods arranged in an end-side pump configuration. A total laser power of 22.46 W was achieved with a 0.9 m collection diameter, corresponding to a 4.49% solar-to-laser power conversion efficiency. This efficiency represents a new benchmark for Fresnel lens systems, reflecting a 16% increase over the previous record. A slope efficiency of 6.76% was also attained, indicating a 7% enhancement. Furthermore, the employment of four rods enabled sustained laser operation for 112 s without reliance on solar tracking assistance. This performance was observed around local solar noon, during which the focal zone underwent a displacement of 0.80° in the azimuthal direction and 0.09° in the altitudinal direction. These outcomes indicate that multirod solar laser systems that involve Fresnel lenses can still be competitive with those employing parabolic mirrors while also being economically advantageous.
开发兼具高效率和成本效益的太阳能激光系统是这项可再生技术实际应用的关键。本文介绍了在菲涅耳透镜焦区对太阳能激光原型进行评估的结果，该原型在那里成功同时发射了四束激光束。它具有一个非球面透镜、一个锥形泵浦腔以及四根以端侧泵浦配置排列的Ce:Nd:YAG棒。在收集直径为0.9米的情况下实现了22.46瓦的总激光功率，对应太阳能到激光功率的转换效率为4.49%。这一效率代表了菲涅耳透镜系统的一个新基准，比之前的记录提高了16%。还获得了6.76%的斜率效率，提高了7%。此外，使用四根棒使得在不依赖太阳跟踪辅助的情况下能够持续激光运行112秒。这一性能是在当地太阳正午前后观察到的，在此期间焦区在方位方向上位移了0.80°，在高度方向上位移了0.09°。这些结果表明，涉及菲涅耳透镜的多棒太阳能激光系统在与采用抛物面镜的系统竞争时仍具有竞争力，同时在经济上也具有优势。
