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4F3/2→4I9/2 and 4F3/2→4I13/2 laser operations with a Nd:GdTaO4 crystal
Optics & Laser Technology ( IF 4.6 ) Pub Date : 2020-06-29 , DOI: 10.1016/j.optlastec.2020.106444
Renpeng Yan , Yiping Zhou , Xudong Li , Yang Liu , Yugang Jiang , Wenming Yao , Fang Peng , Qingli Zhang , Renqin Dou , Jing Gao

This study investigated the laser performance of a Nd:GdTaO4 crystal for the 4F3/24I9/2 and 4F3/24I13/2 transitions at 928 nm and 1328 nm, respectively. A 5-mm-thick, 1.4 at.% Nd:GdTaO4 crystal was used in the experiments, under a pump at 879 nm, directly into the 4F3/2 emitting level. At a 10 Hz pump repetition rate, the maximum pulse energy at 928 nm reached 35.7 mJ, with an optical-to-optical efficiency of ~19.3%. When the pump repetition rate increased to 100 Hz, the laser pulse energy decreased to 13.5 mJ; the laser beam was characterised by M2 factors of Mx2 = 1.4 and My2 = 1.8 for the Ox and Oy axis, respectively. The Nd:GdTaO4 crystal yielded laser pulses at 1328 nm with a maximum energy of 9.7 mJ for operation at 10 Hz repetition rate; the overall optical-to-optical efficiency amounted to ~5.2%. Increasing the pump repetition rate to 100 Hz reduced the laser pulse energy to 5.8 mJ; the laser beam M2 factors were Mx2 = 1.2 and My2 = 1.4.



中文翻译:

使用Nd:GdTaO 4晶体进行4 F 3/24 I 9/24 F 3/24 I 13/2激光操作

这项研究研究了Nd:GdTaO 4晶体分别在928 nm和1328 nm处的4 F 3/24 I 9/24 F 3/24 I 13/2跃迁的激光性能。在实验中,在879 nm的泵浦下,将厚度为5 mm,1.4 at。%的Nd:GdTaO 4晶体直接注入4 F 3/2中。发射水平。以10 Hz的泵浦重复频率,在928 nm处的最大脉冲能量达到35.7 mJ,光-光效率为〜19.3%。当泵浦重复频率增加到100 Hz时,激光脉冲能量降低到13.5 mJ;激光束的特征在于, O x和O y轴的M 2因子分别为M x 2  = 1.4和M y 2 = 1.8 。Nd:GdTaO 4晶体产生1328 nm的激光脉冲,最大能量为9.7 mJ,以10 Hz的重复频率工作。总体光学对光学效率约为5.2%。将泵的重复频率提高到100 Hz,可将激光脉冲能量降低到5.8 mJ;激光束M 2因子为M x 2  = 1.2和M y 2  = 1.4。

更新日期:2020-06-29
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