15 May 2018 5.04% system slope efficiency solar-pumped Nd:YAG laser by a heliostat–parabolic mirror system
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Abstract
We demonstrated a solar-pumped laser with a heliostat–parabolic mirror system. A designed conical pump cavity with a water-filled quartz tube lens was used to couple efficiently the concentrated solar radiation from the focal zone of the primary concentrator into a 5.5-mm-diameter, 95-mm-length grooved Nd:YAG crystal rod within a gold-plated conical pump cavity. For 1.0-m2 effective solar radiation collection area, 20.1-W continuous-wave (CW) output laser power was obtained, corresponding to a total system slope efficiency of 5.04%. This value was 1.31 times higher than the previous with the same solar facility. For 1.5-m2 effective collection area, 34.6-W CW output laser power was achieved at the total system slope efficiency of 4.51%. A strong dependency of laser power on laser rod mounting position was also found.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhe Guan, Zhe Guan, Changming Zhao, Changming Zhao, Haiyang Zhang, Haiyang Zhang, Jinhua Li, Jinhua Li, Dongbing He, Dongbing He, Joana Almeida, Joana Almeida, Claudia R. Vistas, Claudia R. Vistas, Dawei Liang, Dawei Liang, "5.04% system slope efficiency solar-pumped Nd:YAG laser by a heliostat–parabolic mirror system," Journal of Photonics for Energy 8(2), 027501 (15 May 2018). https://doi.org/10.1117/1.JPE.8.027501 . Submission: Received: 8 January 2018; Accepted: 30 April 2018
Received: 8 January 2018; Accepted: 30 April 2018; Published: 15 May 2018
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