Study on 2.7 μm and 4.0 μm dual-wavelength optical parametric oscillator based on periodic cascade MgO:PPLN

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

Infrared Physics & Technology Pub Date : 2025-04-22 DOI:10.1016/j.infrared.2025.105887

Erxian Xing, Xiaodai Yao, Chengcheng Chang, Yue Zhao, Zijian Wang, Yongji Yu, Guangyong Jin

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引用次数: 0

Abstract

A mid-infrared dual-wavelength optical parametric oscillator using a double-ended Yb-doped fiber-pumped double-period cascaded MgO:PPLN is reported. By optimizing the crystal’s effective gain length and adjusting the dual-end pump power, dual-wavelength mid-infrared laser outputs of 2.12 W at 2.7 μm and 1.87 W at 4.0 μm were obtained with pump powers of 14.21 W and 15.87 W from the 1064 nm fiber laser. The effects of gain competition in multi-parameter oscillation were effectively mitigated, enabling dual-wavelength mid-infrared synchronous resonance and reducing the power difference from 0.635 W to 0.25 W. The corresponding conversion efficiencies were 14.9 % and 11.7 %, with pulse widths of 55.39 ns and 40.24 ns, and output power stabilities of 3.16 % and 3.58 %, respectively. By adjusting the temperature of the cascaded crystal between 25 °C and 105 °C, tunable mid-infrared laser outputs with wavelengths ranging from 2477.6 to 2705.6 nm and from 3918.4 to 4006.3 nm were achieved, with corresponding tuning bandwidths of 228 nm and 87.9 nm, respectively.

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基于周期级联MgO:PPLN的2.7 μm和4.0 μm双波长光参量振荡器的研究

报道了一种采用双端掺镱光纤泵浦双周期级联MgO:PPLN的中红外双波长光参量振荡器。通过优化晶体的有效增益长度和调节双端泵浦功率，在1064 nm光纤激光器的泵浦功率分别为14.21 W和15.87 W的情况下，在2.7 μm处可获得2.12 W和1.87 W的双波长中红外激光输出。有效地缓解了多参数振荡中增益竞争的影响，实现了双波长中红外同步谐振，并将功率差从0.635 W减小到0.25 W。相应的转换效率分别为14.9%和11.7%，脉冲宽度分别为55.39和40.24 ns，输出功率稳定性分别为3.16%和3.58%。通过调节级联晶体的温度在25 ~ 105℃之间，可获得波长为2477.6 ~ 2705.6 nm和3918.4 ~ 4006.3 nm的可调谐中红外激光输出，相应的调谐带宽分别为228 nm和87.9 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.