采用全固态2.76 μm激光器泵浦的高压CO2放大器

IF 3.4 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2025-08-25 DOI:10.1016/j.infrared.2025.106105

Zhenzhen Xie , Ziming Wang , Yu Liu , Guochang Wang , Yishen Hou , Liemao Hu , Changjun ke , Zhiyong Li , Rongqing Tan

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引用次数: 0

摘要

采用重复频率为100 Hz的2.76 μm、~ 4.2 mJ ZnGeP2光参量振荡器泵浦多大气CO2放大器，可放大超短脉冲宽的长波红外激光器。采用射频激励CO2激光器作为种子激光器，研究了光泵浦CO2放大器的小信号增益。通过测量CO2在10.28 μm和10.59 μm波长处的增益特性，得到了CO2不对称拉伸模式对应的振动温度T3和平移温度T。10.59 μm激光器的增益系数为1.36% cm−1。最大光能转换效率为3.7%。最大工作压力为13.0 atm，相应的增益带宽为1.58 THz @10.5 μm。结果表明，在多大气光抽运CO2活性介质中放大飞秒10 μm脉冲需要使用焦耳级2.76 μm泵浦激光器。

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High-pressure CO2 amplifier pumped by all-solid-state 2.76 μm laser

Multi-atmospheric CO₂ amplifier pumped by a 2.76 μm, ∼4.2 mJ ZnGeP₂ optical parametric oscillator with repeat frequency of 100 Hz is demonstrated to amplify long wave infrared lasers with ultra-short pulse width. The small-signal gain of the optically pumped CO₂ amplifier was investigated by adopting RF-excited CO₂ lasers as the seed lasers. The vibrational temperature T₃ corresponding to the asymmetric stretching mode of CO₂ and the translational temperature T were obtained by measuring the gain characteristics at the wavelength of 10.28 and 10.59 μm. The gain coefficient for the 10.59 μm laser is 1.36 %cm⁻¹. The maximum optical-to-optical energy conversion efficiency is 3.7 %. The maximal working pressure is 13.0 atm, correspondingly the gain bandwidth with 1.58 THz @10.5 μm. The results indicate that amplifying femtosecond 10 μm pulses in a multi-atmosphere optically pumped CO₂ active medium necessitates a joule-level 2.76 μm pump laser.

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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.