High power continuous-wave, Q-switched, and quasi-continuous-wave operation of a diode-pumped Tm,Ho:YAG laser oscillator at 2.09 μm

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION Infrared Physics & Technology Pub Date : 2024-10-04 DOI:10.1016/j.infrared.2024.105577

Jian-Hong Wu , Yu-Han Hu , Qi Bian , Yong Bo , Da-Fu Cui , Qin-Jun Peng

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Abstract

A high-power diode-pumped 2.09 μm Tm,Ho:YAG laser oscillator with multi-regime operation is demonstrated. In the continuous-wave (CW) regime, it delivers 44.68 W output power with M² = 3.47, yielding a record-high brightness of 87.57 MW/cm²·sr. In the Q-switched mode, stable laser performance across pulse repetition frequencies (PRFs) from 1 kHz to 4 kHz is achieved. At a PRF of 1 kHz, single pulse energy reaches 22.85 mJ with a pulse width of 443.4 ns and M² = 3.50. In the quasi-continuous-wave (QCW) operation, a pulse energy of 31.85 mJ is obtained at 200 Hz with a 370 μs pulse width and M² = 4.49. These pulse energies are the highest reported to date for Tm-Ho co-doped laser oscillators at high PRF. This also marks the first demonstration of a versatile 2 μm laser that can operate at room temperature while delivering high-energy, high-repetition-rate pulses in both nanosecond and microsecond durations within a single device, making it highly appealing for scientific and industrial applications.

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二极管泵浦 Tm、Ho：YAG 激光振荡器在 2.09 μm 波长的高功率连续波、Q 开关和准连续波运行

我们展示了一种多模式运行的高功率二极管泵浦 2.09 μm Tm,Ho:YAG 激光振荡器。在连续波（CW）模式下，它的输出功率为 44.68 W，M2 = 3.47，亮度达到创纪录的 87.57 MW/cm2-sr。在 Q 开关模式下，激光器在 1 kHz 至 4 kHz 的脉冲重复频率（PRF）范围内性能稳定。在 1 kHz 的脉冲重复频率下，单脉冲能量达到 22.85 mJ，脉冲宽度为 443.4 ns，M2 = 3.50。在准连续波（QCW）操作中，200 Hz 频率下的脉冲能量为 31.85 mJ，脉冲宽度为 370 μs，M2 = 4.49。这些脉冲能量是迄今为止在高 PRF 条件下 Tm-Ho 共掺激光振荡器获得的最高能量。这也标志着首次展示了一种多功能 2 μm 激光器，它可以在室温下工作，同时在单个设备中提供纳秒和微秒持续时间的高能量、高重复率脉冲，因此在科学和工业应用中极具吸引力。

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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.