We present the flexible delivery of picosecond laser pulses with up to 20 W average power over a 3-m-long sample of antiresonant hollow-core fiber(AR-HCF)for laser-micromachining applications.Our experiments highlight...We present the flexible delivery of picosecond laser pulses with up to 20 W average power over a 3-m-long sample of antiresonant hollow-core fiber(AR-HCF)for laser-micromachining applications.Our experiments highlight the importance of optical-mode purity of the AR-HCF for manufacturing precision.We demonstrate that compared with an AR-HCF sample with a capillary to core(d/D)ratio of approximately 0.5,the AR-HCF with a d/D ratio of approximately 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 setup 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.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.62205353 and 62275254)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB0650000)+1 种基金the Shanghai Science and Technology Plan Project Funding(Grant No.23JC1410100)the Fuyang High-level Talent Group Project
文摘We present the flexible delivery of picosecond laser pulses with up to 20 W average power over a 3-m-long sample of antiresonant hollow-core fiber(AR-HCF)for laser-micromachining applications.Our experiments highlight the importance of optical-mode purity of the AR-HCF for manufacturing precision.We demonstrate that compared with an AR-HCF sample with a capillary to core(d/D)ratio of approximately 0.5,the AR-HCF with a d/D ratio of approximately 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 setup 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.
