Kozioł Paweł, Jaworski Piotr, Krzempek Karol, Hoppe Viktoria, Dudzik Grzegorz, Yu Fei, Wu Dakun, Liao Meisong, Knight Jonathan, Abramski Krzysztof
Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
Centre for Advanced Manufacturing Technologies (CAMT), Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
Sensors (Basel). 2021 Nov 16;21(22):7591. doi: 10.3390/s21227591.
In this work, we present femtosecond laser cutting of microchannels in a nodeless antiresonant hollow-core fiber (ARHCF). Due to its ability to guide light in an air core combined with exceptional light-guiding properties, an ARHCF with a relatively non-complex structure has a high application potential for laser-based gas detection. To improve the gas flow into the fiber core, a series of 250 × 30 µm microchannels were reproducibly fabricated in the outer cladding of the ARHCF directly above the gap between the cladding capillaries using a femtosecond laser. The execution time of a single lateral cut for optimal process parameters was 7 min. It has been experimentally shown that the implementation of 25 microchannels introduces low transmission losses of 0.17 dB (<0.01 dB per single microchannel). The flexibility of the process in terms of the length of the performed microchannel was experimentally demonstrated, which confirms the usefulness of the proposed method. Furthermore, the performed experiments have indicated that the maximum bending radius for the ARHCF, with the processed 100 µm long microchannel that did not introduce its breaking, is 15 cm.
在这项工作中，我们展示了在无节点反谐振空芯光纤（ARHCF）中进行微通道的飞秒激光切割。由于其能够在空气芯中引导光并具有出色的光导特性，结构相对不复杂的ARHCF在基于激光的气体检测方面具有很高的应用潜力。为了改善气体流入光纤芯，使用飞秒激光在ARHCF外包层中、包层毛细管之间间隙正上方可重复地制造了一系列250×30 µm的微通道。对于最佳工艺参数，单次横向切割的执行时间为7分钟。实验表明，25个微通道的实施引入了0.17 dB的低传输损耗（每个单个微通道<0.01 dB）。实验证明了该工艺在已执行微通道长度方面的灵活性，这证实了所提方法的实用性。此外，所进行的实验表明，对于加工有100 µm长微通道且未导致其断裂的ARHCF，其最大弯曲半径为15 cm。
