同带泵浦Ho~(3+)激光晶体1.2μm波段红外激光阈值功率（英文）
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摘要
为探索同带泵浦掺杂Ho~(3+)激光晶体1.2μm波段红外激光输出,采用掺杂浓度为1 at%的Ho~(3+):LLF激光晶体作为激光增益介质,应用两种典型准三能级理论模型,计算了Ho~(3+)在5I6和5I8能级间跃迁辐射1.19μm激光的阈值功率,分析了泵浦光和激光束腰半径、激光晶体长度、吸收损耗、腔镜反射率等参量与阈值功率的变化关系,得出了吸收损耗是影响阈值功率最敏感因素的重要结论,确定了泵浦阈值功率的范围,为后续1.2μm波段红外激光实验研究提供了可靠的理论参考数据.
The threshold power of 1.2μm laser generated from the Ho~(3+):LLF crystal was discussed.Two typical quasi-three-level theoretical models were used to analyze the effectiveness of 1194 nm laser's threshold power in the in-band pumping source of 1.15μm fiber laser with different parameters,such as the absorption coefficient of laser medium,the laser beam radius,the crystal length and reflectivity of the output mirror.It was found that the re-absorption loss was the most important factor leading to the different results for the two models,and the second model was close to the practice because of the narrowbandwidth pumping beam(<6 nm).The results provided reliable data of Ho~(3+)-doped 1.2μm solid-state laser systems for the design and experimental research in further.
The threshold power of 1.2μm laser generated from the Ho~(3+):LLF crystal was discussed.Two typical quasi-three-level theoretical models were used to analyze the effectiveness of 1194 nm laser's threshold power in the in-band pumping source of 1.15μm fiber laser with different parameters,such as the absorption coefficient of laser medium,the laser beam radius,the crystal length and reflectivity of the output mirror.It was found that the re-absorption loss was the most important factor leading to the different results for the two models,and the second model was close to the practice because of the narrowbandwidth pumping beam(<6 nm).The results provided reliable data of Ho~(3+)-doped 1.2μm solid-state laser systems for the design and experimental research in further.
引文
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[2]CHEN Xiu-Yan,LI Xiu,ZHANG Hao-Lei,et al.589nm yellow laser generation by intra-cavity sum-frequency mixing in a T-shaped Nd:YAG laser cavity[J].Chinese Optics Letters,2009,7(9),815-818.
[3]DONG Shu-Fu,CHENN Guo-Fu,ZHAO Shang-Hong,et al.Theoretical study on the 1180nm laser pumped Tm3+,Ho3+co-doped silica fiber laser[J].Laser Techology,2006,30(2):138-141.
[4]AUBERT C,VOS M H,MATHIS P,et al.Fe Intraprotein radical transfer during photoactivation of DNA photolyase[J].Nature,2000,405(6786):586-590.
[5]SHNG S C,GERSTENBERGER D C.Advances in multiple wavelength He-Ne lasers,Proceedings of SPIE,1987[C].,Los Angeles,CA:1987,Lee R.Carlson,76.
[6]SHEN Yin-Jie,YAO Bao-Quan,DUAN Xiao-Ming,et al.103 W inband dual-end-pumped Ho3+:YAG laser[J].Optics Letters,2012,37(17):3588-3560.
[7]ZHU Xiu-Shan,ZONG Jie,Miller A,et al.Single-frequency Ho3+-doped ZBLAN fiber laser at 1200 nm[J].Optics Letters,2012,37(20):4185-4187.
[8]ZHU Xiu-Shan,ZONG Jie,WIERSMA K,et al.Watt-level shortlength holmium-doped ZBLAN fiber lasers at 1.2μm[J].Optics Letters,2014,39(6):1533-1536.
[9]LIU Shu-Jing,ZHU Xiu-Shan,ZHU Gong-Wen,et al.Graphene Q-switched Ho3+-doped ZBLAN fiber laser at 1190 nm[J].Optics Letters,2015,40(2):147-150.
[10]TAKUNORI T,TULLOCH W M,BYER R L.Modeling of quasithree-level lasers and operation of cw Yb3+:YAG lasers[J].Applied Optics,1997,36(9):1867-1874.
[11]RISK W P.Modeling of longitudinally pumped solid-state lasers exhibiting reabsorption losses[J].Journal of the Optical Society of America B,1988,5(7):1412-1423.
[12]ZHU Jian,ZHANG Guang-Yin,CHEN Xiao-Bo.Theoretical analysis for Ho3+laser threshold[J].Acta Physca Sinca(朱箭,张光寅,陈晓波.Ho激光器阂值的理论分析.物理学报),1996,45(8):1337-1343.