Direct generation of visible short-pulse vortex beam in a blue LD-pumped electro-optically Q-switched Pr: YLF laser

IF 5 2区物理与天体物理 Q1 OPTICS Optics and Laser Technology Pub Date : 2025-03-05 DOI:10.1016/j.optlastec.2025.112740

Haotian Gao , Qi Yang , Xiaoyang Guo , Wenhui Ji , Yuqian Zu , Chun Li , Syed Zaheer Ud Din , Yongjing Wu , Ruizhan Zhai , Zhongqing Jia

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Abstract

We report on the direct generation of visible short-pulse vortex beam in a blue LD-pumped electro-optically (EO) Q-switched Pr:YLF laser. A Q-switched fundamental (TEM₀₀) mode laser has been realized with the pulse width of 52.2 ns and the single pulse energy of 22.2 μJ at the repetition rate of 10 kHz. By employing the spot-defect on the surface of the cavity mirror, the vortex modes of visible short-pulse lasers have been achieved. The laser yield Q-switched pulse width of 180.4 ns and pulse energy of 8.0 μJ at a repetition rate of 10 kHz in the first order Laguerre Gaussian (LG₀₁) mode. By adjusting the radius of spot-defect, a Q-switched pulse width of 273.5 ns and pulse energy of 6.0 μJ at a repetition rate of 10 kHz in the second order Laguerre Gaussian (LG₀₂) mode has also been achieved. This study provides an effective method for generating high energy arbitrary order visible short-pulse vortex lasers, which has promising potential in fields such as materials processing and super-resolution imaging.

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在蓝色ld泵浦电光调q Pr: YLF激光器中直接产生可见短脉冲涡旋光束

本文报道了在蓝色ld泵浦电光调q Pr:YLF激光器中直接产生可见短脉冲涡旋光束。实现了脉冲宽度为52.2 ns、单脉冲能量为22.2 μJ、重复频率为10 kHz的调q基频（TEM00）激光器。利用腔镜表面的光斑缺陷，实现了可见短脉冲激光的涡旋模式。激光在一阶拉盖尔高斯（LG01）模式下，以10 kHz的重复频率产生调q脉冲宽度为180.4 ns，脉冲能量为8.0 μJ。通过调整缺陷点半径，在二阶lagerre - Gaussian （LG02）模式下实现了频率为10 kHz的调q脉冲宽度为273.5 ns，脉冲能量为6.0 μJ。本研究提供了产生高能任意阶可见短脉冲涡旋激光器的有效方法，在材料加工和超分辨率成像等领域具有广阔的应用前景。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems