Theoretical calculation and experimental study on absorption properties of Yb: YAG crystal applied in thin disk laser

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• 作者：Changli Li^a ; Rui Liu^a ; ^b ; Faquan Gong^b ; Yong Jia^b ; Songwen Deng^b ; Yuqi Jin^b ; Gang Li^b ; ^{3798409@qq.com}
• 关键词：Thin disk laser ; Absorption efficiency ; Diode-pumped solid-state lasers ; Yb ; YAG crystal
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：511-516
• 全文大小：1088 K
• 卷排序：130

文摘

The thin disk laser is presented as an optimal laser design for the operation of a quasi-three-level laser active medium. In this paper, according to the Lambert-Bill’s equation, the absorption efficiency with pump laser incident angle and pump pass numbers at room temperature is given for Yb:YAG crystal (Yb3+10%, 0.3 mm thickness). The absorption efficiency is 93.98% for 24 absorption passes with 0.349 rad incident angle. It will be close to 100% when the number of pump passes of Yb: YAG crystal (0.3 mm) is higher than 48, and continuously increasing pump pass numbers no more contribution to optical efficiency. The experimental investigations yield an output power of 41.6 W/1030 nm at 52% slope efficiency at room temperature. At last, the experimental results are analyzed, and methods are promoted to improve the optical efficiency.