Comparison in 2.1 μm laser performances among Tm:YLF laser intra-cavity pumped Ho:YLF, Ho:YAG, and Ho:YAP lasers
Comparison in 2.1 μm laser performances among Tm:YLF laser intra-cavity pumped Ho:YLF, Ho:YAG, and Ho:YAP lasers
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Tm:YLF 激光腔内泵浦 Ho:YLF、Ho:YAG 和 Ho:YAP 激光器的 2.1 μm 激光性能比较
DOI：
10.1016/j.infrared.2022.104282
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发表时间：
2022
影响因子：
3.3
通讯作者：
Wenxiong Lin
中科院分区：
文献类型：
--
作者：
Hu Xu;Hongchun Wu;Jianhong Huang;Haizhou Huang;Wen Weng;Huagang Liu;Jinhui Li;Jinming Chen;Wenxiong Lin
•采用弱热透镜Tm:YLF晶体，比较腔内泵浦Ho:YLF、Ho:YAG和Ho:YAP激光器的激光性能。•波长为1909 nm的c-cut Tm:YLF激光器的σ-极化与上述晶体的有效2.1 μm激光器的吸收带相匹配。•Ho:YLF、Ho:YAG和Ho:YAP激光器分别在2063.1 nm、2122.2 nm和2129.5 nm处获得了8.63 w、7.45 w和3.55 w的最大功率。研究了在紧凑线性腔内用σ偏振Tm:YLF激光器泵浦的c切Ho:YLF、Ho:YAG和c切Ho:YAP激光器的激光特性。由于基体介质的弱热透镜效应，在2063.1 nm处，Ho:YLF激光器的最大Ho功率为8.63 W，斜率效率为25.2%，m2为1.41。Ho:YAG和Ho:YAP激光器在2122.2 nm和2129.5 nm处的最大输出功率分别为7.45 W和3.55 W，斜率效率分别为23.1%和11.8%。
• Tm:YLF crystal, with weak thermal lens was applied for comparing lasing performances among the intra-cavity pumped Ho:YLF, Ho:YAG, and Ho:YAP lasers. • c-cut Tm:YLF laser with wavelength at 1909 nm for σ-polarization matches well with absorption bands of the aforementioned crystals for an efficient 2.1 μm laser. • Maximum powers of 8.63 w at 2063.1 nm, 7.45 W at 2122.2 nm and 3.55 W at 2129.5 nm were obtained, respectively from the Ho:YLF, Ho:YAG, and Ho:YAP lasers. We demonstrate lasing properties of the c-cut Ho:YLF, Ho:YAG and c-cut Ho:YAP laser intra-cavity pumped by a σ-polarized Tm:YLF laser within a compact linear cavity. Owing to the weak thermal lens of the YLF-based host media, maximum Ho laser power of 8.63 W at 2063.1 nm, with a slope efficiency of 25.2% and M 2 of 1.41 was obtained in the Ho:YLF laser. Besides, maximum output power of 7.45 W at 2122.2 nm and 3.55 W at 2129.5 nm were obtained with the Ho:YAG and Ho:YAP lasers, respectively, with corresponding slope efficiencies of 23.1% and 11.8%.