Hundred-watt Ho:YAG oscillator pumped by high-power Tm:YLF laser with orthogonal cylindrical lenses spot shaping

IF 3.4 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION Infrared Physics & Technology Pub Date : 2024-08-14 DOI:10.1016/j.infrared.2024.105510

Disheng Wei, Jinwen Tang, Junhui Li, Xiaoxiao Hua, Minglang Wu, Wenhao Cheng, Baoquan Yao, Tongyu Dai, Xiaoming Duan, Youlun Ju

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Abstract

A hundred-watt, linearly-polarized Ho:YAG oscillator, pumped by a 200 W, home-made and s-polarized Tm:YLF laser, was demonstrated. By utilizing a combination of a half-wave plate (HWP) and a thin-film polarizer (TFP), the Tm:YLF laser was split into two orthogonally polarized parts. Each part was significantly reshaped by a system of orthogonally arranged cylindrical lenses and subsequently used to dual-end pump the oscillator. With a total incident pump power of 183 W, a continuous wave (CW) output power of 101 W at 2.1 μm was achieved, with corresponding slope efficiency and optical-to-optical conversion efficiency (OOCE) of 61.6 % and 55.2 %, respectively. Additionally, the beam quality factors, measured in the x and y directions, were 1.59 and 1.35, respectively. Finally, under Q-switched operation at a repetition rate of 20 kHz, a maximum output power of 97 W was achieved, with a corresponding pulse width of less than 34 ns. The central wavelength of the laser was measured to be 2090.2 nm.

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采用正交圆柱透镜光斑整形的高功率 Tm:YLF 激光器泵浦的百瓦级 Ho:YAG 振荡器

演示了由 200 瓦自制 s 偏振 Tm:YLF 激光器泵浦的百瓦级线性偏振 Ho:YAG 振荡器。通过结合使用半波板（HWP）和薄膜偏振片（TFP），Tm:YLF 激光器被分成两个正交偏振部分。每个部分都通过一个正交排列的圆柱透镜系统进行了大幅整形，随后用于双端泵浦振荡器。在入射泵浦总功率为 183 W 的情况下，2.1 μm 波长的连续波（CW）输出功率为 101 W，相应的斜率效率和光-光转换效率（OOCE）分别为 61.6 % 和 55.2 %。此外，在 x 和 y 方向测量的光束质量因子分别为 1.59 和 1.35。最后，在重复频率为 20 kHz 的 Q 开关操作下，最大输出功率达到 97 W，相应的脉冲宽度小于 34 ns。经测量，该激光器的中心波长为 2090.2 nm。

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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.