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arXiv · 2502.00353

Flexible delivery of high-power picosecond laser in purely-single optical mode of anti-resonant hollow-core fiber for micromachining

Xinshuo Chang·Qinan Jiang·Zhiyuan Huang·Jinyu Pan·Qingwei Zhang·Nan Li·Zhuozhao Luo·Ruochen Yin·Wenbin He·Jiapeng Huang·Yuxin Leng·Xin Jiang·Shanglu Yang·Meng Pang
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Abstract

We present the flexible delivery of picosecond laser pulses with up to 20 W average power over a 3-m-long sample of anti-resonant hollow-core fiber (AR-HCF) for laser micromachining applications. Our experiments highlight the importance of optical mode purity of the AR-HCF for the manufacturing precision. We demonstrate that compared with an AR-HCF sample with a capillary to core (d/D) ratio of ~0.5, the AR-HCF with a d/D ratio of ~0.68 exhibits better capability of high-order-mode suppression, giving rise to improved micromachining quality. Moreover, the AR-HCF delivery system exhibits better pointing stability and set-up flexibility than the free-space beam delivery system. These results pave the way to practical applications of AR-HCF in developing advanced equipment for ultrafast laser micromachining.

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Xinshuo Chang, Qinan Jiang, Zhiyuan Huang, Jinyu Pan, Qingwei Zhang, Nan Li, Zhuozhao Luo, Ruochen Yin, Wenbin He, Jiapeng Huang, Yuxin Leng, Xin Jiang, Shanglu Yang, Meng Pang. 2025-02-01. Flexible delivery of high-power picosecond laser in purely-single optical mode of anti-resonant hollow-core fiber for micromachining. https://arxiv.org/abs/2502.00353

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