研究人员开发出高效的中长波光参量振荡器泵源

发布时间:2023-02-15 08:00:00 阅读数: 661

由Tm:YLF激光器泵浦的Ho:YAG激光器的实验装置。资料来源:《Scientific Reports》(2023)。DOI: 10.1038/s41598-023-27970-0

可广泛调谐的中长波红外(8-12μm)激光器位于大气窗范围和人眼安全范围内。它们被广泛地应用于激光雷达领域。​

中国科学院航天信息研究所的一个研究小组开发了一种高效率的中长波光参量振荡器泵浦源:Ho:YAG激光器,通过扫描和优化泵浦激光器的波长,实现了高效率的2.1μm激光输出。

这项研究于1月18日发表在《Scientific Reports》上。

一个可调谐的Tm:YLF激光器是Ho:YAG激光器的泵源。根据体布拉格光栅(VBG)的温度调谐特性,Tm:YLF激光器的连续可调谐波长范围为1906.04至1908.83纳米,对应的线宽小于0.41纳米。

通过扫描和优化泵浦光的波长,在泵浦源的中心波长1907.36纳米下,Ho:YAG激光器输出的光-光转换效率为59.12%,斜率效率为68.26%。

他们用Ho:YAG激光器作为ZnGeP2光参量振荡器(ZGP-OPO)的泵浦源,获得了I型相位匹配下的高效可调谐长波红外激光,调谐范围为8.02-9.15μm。

更多信息:Juntao Tian等,由窄线宽可调谐的1.91微米激光器泵浦的2097纳米Ho:YAG激光器,《Scientific Reports》(2023)。DOI: 10.1038/s41598-023-27970-0

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