基于ZGP光参量振荡器的高重复率、可调谐中红外涡旋光束产生

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-05-13 DOI:10.1016/j.optcom.2025.131996

Jun Meng , Fei Wang , Gaoyou Liu , Zhaojun Liu

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引用次数: 0

摘要

提出了一种基于ZnGeP2 （ZGP）光参量振荡器（OPO）的可调谐、高重复率中红外涡旋激光器，该激光器采用2.1 μm涡旋激光器抽运单谐振平面平行腔。通过旋转ZGP晶体，信号波长在3.4 ~ 4.1 μm范围内可调，对应的空闲输出在4.2 ~ 5.3 μm范围内。信号涡旋光束保持与泵浦相同的拓扑电荷，而空转光束呈现高斯强度分布。在脉冲重复频率为10 kHz时，信号（3.89 μm）和惰子（4.55 μm）的最大输出功率分别为6.5 W和5 W，脉冲宽度分别为60.3 ns和54.8 ns。这项工作展示了一种高效和灵活的方法来产生中红外涡旋光束，提高了在高分辨率成像，光谱学和非线性光学中的应用潜力。

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High repetition rate, tunable mid-infrared vortex beam generation based on ZGP optical parametric oscillator

We present a tunable, high-repetition-rate mid-infrared vortex laser based on ZnGeP₂ (ZGP) optical parametric oscillator (OPO) with a singly resonant plane-parallel cavity which was pumped by a 2.1 μm vortex laser. The signal wavelength was tunable from 3.4 to 4.1 μm by rotating the ZGP crystal, while the corresponding idler output ranged from 4.2 to 5.3 μm. The signal vortex beam retained the same topological charge as the pump, while the idler beam exhibited a Gaussian intensity profile. At pulse repetition frequency of 10 kHz, the system achieved maximum output powers of 6.5 W for the signal (3.89 μm) and 5 W for the idler (4.55 μm), with pulse widths of 60.3 ns and 54.8 ns, respectively. This work demonstrates a highly efficient and flexible approach to generating vortex beams in the mid-infrared, advancing the potential for applications in high-resolution imaging, spectroscopy, and nonlinear optics.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.