A Q-switched Ho:YAG spatial ring cavity laser with three corner cube prisms pumped by a 1908 nm fiber laser

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2024-08-30 DOI:10.1016/j.infrared.2024.105538

Dong Yan , Sining Li , Youlun Ju , Jiawei Fan , Xiaoming Duan , Jiaze Wu , Ying Chen , Yiming Zhao , Tongyu Dai

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Abstract

We demonstrate a tri-corner cube Q-switched Ho:YAG spatial ring cavity laser, which was resonantly pumped by a 1908 nm fiber laser. The polarization state of the intracavity oscillating laser was adjusted by a half-wave plate, and a continuous s-polarized laser of 2.57 W at 2090.9 nm was obtained at a pump power of 18.5 W, corresponding to an optical-to-optical conversion efficiency of 13.9 % and a slope efficiency of 33.3 %. When the corner cube prism, which has the weakest anti-misalignment capability, was tilted vertically by 1° or horizontally by 0.92°, the laser could still output the laser. For Q-switched operation, the tri-corner cube Ho:YAG laser has a pulse energy of 9.86mJ and a pulse width of 178.8 ns at a repetition rate of 100 Hz. At the maximum output energy, the beam quality was M_x² = 1.3, M_y² = 1.2.

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由 1908 nm 光纤激光器泵浦的带有三个角立方棱镜的 Q 开关 Ho:YAG 空间环腔激光器

我们展示了一种三角立方体 Q 开关 Ho:YAG 空间环腔激光器，该激光器由 1908 nm 光纤激光器共振泵浦。通过半波板调节腔内振荡激光器的偏振态，在泵浦功率为 18.5 W 时，获得了波长为 2090.9 nm、功率为 2.57 W 的连续 s 偏振激光器，光-光转换效率为 13.9 %，斜率效率为 33.3 %。当抗偏移能力最弱的角立方棱镜垂直倾斜 1° 或水平倾斜 0.92° 时，激光器仍能输出激光。在 Q 开关工作时，三角柱体 Ho:YAG 激光器的脉冲能量为 9.86mJ，脉冲宽度为 178.8ns，重复频率为 100 Hz。在最大输出能量下，光束质量为 Mx2 = 1.3，My2 = 1.2。

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.