2 μm eye-safe solar-pumped laser

Xuetong Lin, Suhui Yang*

*此作品的通讯作者

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

Solar-pumped laser using solar radiation as pumping source converts sunlight to laser directly. It has the following advantages over other solid-state lasers: sufficient energy resource, clean and pollution-free, long service life, and low manufacturing costs. Up to now, researches on solar-pumped laser have been limited to the 1 μm band with Nd3+ doped gain medium. By analyzing the absorption spectrum of the existing solid-state materials, we have found that Tm3+ doped materials have strong absorption in visible light band where the solar radiation is strong. 2 μm eye-safe laser has a greater application prospect in the fields of remote sensing, LiDAR, medical treatment, and space optical communication. In this paper, the absorption spectrum and spectral overlap of two common laser crystals, Tm:YAG and Tm:YAP, with the solar radiation have been analyzed and calculated. The threshold pump power density of these two crystals were calculated as 1.14 Kw/cm3, 1.434Kw/cm3 respectively. Tm:YAG crystal with lower threshold pump power density was selected as the gain medium and a two-stage pumping model was built. A Fresnel lens was used as the primary solar light concentrator. The secondary concentrator was a conic cavity with a defused high reflection surface. The laser rod with grooved side wall was installed in the conical cavity. Tracepro was used to optimize the whole setup. The work in this paper made a theoretical preparation for experimental research of 2 μm solar-pumped laser.

源语言英语
主期刊名High-Power Lasers and Applications XI
编辑Ruxin Li, Shibin Jiang, Ingmar Hartl
出版商SPIE
ISBN(电子版)9781510639034
DOI
出版状态已出版 - 2020
活动High-Power Lasers and Applications XI 2020 - Virtual, Online, 中国
期限: 12 10月 202016 10月 2020

出版系列

姓名Proceedings of SPIE - The International Society for Optical Engineering
11544
ISSN(印刷版)0277-786X
ISSN(电子版)1996-756X

会议

会议High-Power Lasers and Applications XI 2020
国家/地区中国
Virtual, Online
时期12/10/2016/10/20

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