{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T17:06:17Z","timestamp":1770743177900,"version":"3.49.0"},"reference-count":30,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2021,11,16]],"date-time":"2021-11-16T00:00:00Z","timestamp":1637020800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science Centre (NCN)","award":["UMO-2018\/30\/Q\/ST3\/00809"],"award-info":[{"award-number":["UMO-2018\/30\/Q\/ST3\/00809"]}]},{"DOI":"10.13039\/501100014434","name":"Polish National Agency for Academic Exchange","doi-asserted-by":"publisher","award":["PPI\/APM\/2018\/1\/00031\/U\/001"],"award-info":[{"award-number":["PPI\/APM\/2018\/1\/00031\/U\/001"]}],"id":[{"id":"10.13039\/501100014434","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61935002, 61961136003"],"award-info":[{"award-number":["61935002, 61961136003"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Key Research Program of Frontier Sciences, Chinese Academy of Sciences","award":["ZDBS-LY- JSC020"],"award-info":[{"award-number":["ZDBS-LY- JSC020"]}]},{"name":"Foundation for Polish Science within the First TEAM program co-financed by the European Un-ion under the European Regional Development Fund","award":["POIR.04.04.00-00-434D\/17-00"],"award-info":[{"award-number":["POIR.04.04.00-00-434D\/17-00"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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 \u00d7 30 \u00b5m 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 (&lt;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 \u00b5m long microchannel that did not introduce its breaking, is 15 cm.<\/jats:p>","DOI":"10.3390\/s21227591","type":"journal-article","created":{"date-parts":[[2021,11,17]],"date-time":"2021-11-17T09:16:11Z","timestamp":1637140571000},"page":"7591","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5203-8735","authenticated-orcid":false,"given":"Pawe\u0142","family":"Kozio\u0142","sequence":"first","affiliation":[{"name":"Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4476-5577","authenticated-orcid":false,"given":"Piotr","family":"Jaworski","sequence":"additional","affiliation":[{"name":"Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"given":"Karol","family":"Krzempek","sequence":"additional","affiliation":[{"name":"Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4182-2441","authenticated-orcid":false,"given":"Viktoria","family":"Hoppe","sequence":"additional","affiliation":[{"name":"Centre for Advanced Manufacturing Technologies (CAMT), Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"given":"Grzegorz","family":"Dudzik","sequence":"additional","affiliation":[{"name":"Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1831-859X","authenticated-orcid":false,"given":"Fei","family":"Yu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China"},{"name":"Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4962-4549","authenticated-orcid":false,"given":"Dakun","family":"Wu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China"},{"name":"Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China"}]},{"given":"Meisong","family":"Liao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China"}]},{"given":"Jonathan","family":"Knight","sequence":"additional","affiliation":[{"name":"Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK"}]},{"given":"Krzysztof","family":"Abramski","sequence":"additional","affiliation":[{"name":"Laser & Fiber Electronics Group, Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"24318","DOI":"10.1364\/OE.26.024318","article-title":"Highly Sensitive and Selective CO Sensor Using a 2.33 \u00b5m Diode Laser and Wavelength Modulation Spectroscopy","volume":"26","author":"Cui","year":"2018","journal-title":"Opt. 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