5.04% system slope efficiency solar-pumped Nd: YAG laser by a heliostat-parabolic mirror system

Zhe Guan, Changming Zhao, Haiyang Zhang, Jinhua Li, Dongbing He, Joana Almeida, Cláudia R. Vistas, Dawei Liang

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number027501
JournalJournal of Photonics for Energy
Volume8
Issue number2
DOIs
Publication statusPublished - 1 Apr 2018

Keywords

  • heliostat-parabolic mirror
  • solid-state lasers
  • total system slope efficiency

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