Generation of 435 MHz, Ultrafast Cylindrical Vector Pulses From a Mode-Locked Fiber Laser

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-06-26 DOI:10.1109/LPT.2025.3583586

Chixuan Zou;Zichen Zhao;Mengyun Hu;Guangyi Wu;Junyu Chen;Yanshu Wu;Tao Liu;Shuai Yuan

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引用次数: 0

Abstract

Cylindrical vector beams have spawned numerous applications in modern optics. Although cylindrical vector pulses with several tens of megahertz repetition rate can be obtained directly at the laser source with high-purity structured modes, cylindrical vector pulses with hundreds of megahertz or gigahertz repetition rate have greater application prospects in the fields of laser processing and super-resolution imaging. Here, we report on the generation of a repetition-rate of 435.8 MHz, cylindrical vector pulses from a fundamentally mode-locked Yb-doped solid-state fiber laser. The nonlinear-polarization-evolution (NPE) mode-locking and high pump power injection enabled short pulses with high repetition rate, while on-demanded cylindrical vector beams including radially and azimuthally polarized beams were yielded by adjusting the polarization control elements inside the cavity. Mode-locked pulses were delivered with an average power of 315 mW, a spectrum bandwidth of 23 nm, and a pulse duration of 904 fs. To the best of our knowledge, it is the highest repetition rate from a fundamentally mode-locked Yb-fiber laser which directly generates cylindrical vector pulses.

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从锁模光纤激光器产生435 MHz超快圆柱矢量脉冲

圆柱矢量光束在现代光学中产生了许多应用。虽然在高纯度结构模的激光源处可以直接获得重复频率为几十兆赫的圆柱矢量脉冲，但重复频率为数百兆赫或千兆赫的圆柱矢量脉冲在激光加工和超分辨率成像领域具有更大的应用前景。在这里，我们报道了从一个基本锁模掺镱固体光纤激光器产生重复率为435.8 MHz的圆柱形矢量脉冲。非线性偏振演化锁模和高泵浦功率注入可实现高重复频率的短脉冲，同时通过调节腔内偏振控制元件产生按需的径向和方位角极化的圆柱形矢量光束。锁模脉冲的平均功率为315 mW，频谱带宽为23 nm，脉冲持续时间为904 fs。据我们所知，这是直接产生圆柱形矢量脉冲的基本锁模光纤激光器的最高重复率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.