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Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres

Fibre lasers operating at the mid-IR have attracted enormous interest due to the plethora of applications in defence, security, medicine, and so on. However, no continuous-wave (CW) fibre lasers beyond 4 μm based on rare-earth-doped fibres have been demonstrated thus far. Here, we report efficient m...

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Autores principales: Zhou, Zhiyue, Wang, Zefeng, Huang, Wei, Cui, Yulong, Li, Hao, Wang, Meng, Xi, Xiaoming, Gao, Shoufei, Wang, Yingying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8755826/
https://www.ncbi.nlm.nih.gov/pubmed/35022386
http://dx.doi.org/10.1038/s41377-021-00703-6
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author Zhou, Zhiyue
Wang, Zefeng
Huang, Wei
Cui, Yulong
Li, Hao
Wang, Meng
Xi, Xiaoming
Gao, Shoufei
Wang, Yingying
author_facet Zhou, Zhiyue
Wang, Zefeng
Huang, Wei
Cui, Yulong
Li, Hao
Wang, Meng
Xi, Xiaoming
Gao, Shoufei
Wang, Yingying
author_sort Zhou, Zhiyue
collection PubMed
description Fibre lasers operating at the mid-IR have attracted enormous interest due to the plethora of applications in defence, security, medicine, and so on. However, no continuous-wave (CW) fibre lasers beyond 4 μm based on rare-earth-doped fibres have been demonstrated thus far. Here, we report efficient mid-IR laser emission from HBr-filled silica hollow-core fibres (HCFs) for the first time. By pumping with a self-developed thulium-doped fibre amplifier seeded by several diode lasers over the range of 1940–1983 nm, narrow linewidth mid-IR emission from 3810 to 4496 nm has been achieved with a maximum laser power of about 500 mW and a slope efficiency of approximately 18%. To the best of our knowledge, the wavelength of 4496 nm with strong absorption in silica-based fibres is the longest emission wavelength from a CW fibre laser, and the span of 686 nm is also the largest tuning range achieved to date for any CW fibre laser. By further reducing the HCF transmission loss, increasing the pump power, improving the coupling efficiency, and optimizing the fibre length together with the pressure, the laser efficiency and output power are expected to increase significantly. This work opens new opportunities for broadly tunable high-power mid-IR fibre lasers, especially beyond 4 μm.
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spelling pubmed-87558262022-01-20 Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres Zhou, Zhiyue Wang, Zefeng Huang, Wei Cui, Yulong Li, Hao Wang, Meng Xi, Xiaoming Gao, Shoufei Wang, Yingying Light Sci Appl Article Fibre lasers operating at the mid-IR have attracted enormous interest due to the plethora of applications in defence, security, medicine, and so on. However, no continuous-wave (CW) fibre lasers beyond 4 μm based on rare-earth-doped fibres have been demonstrated thus far. Here, we report efficient mid-IR laser emission from HBr-filled silica hollow-core fibres (HCFs) for the first time. By pumping with a self-developed thulium-doped fibre amplifier seeded by several diode lasers over the range of 1940–1983 nm, narrow linewidth mid-IR emission from 3810 to 4496 nm has been achieved with a maximum laser power of about 500 mW and a slope efficiency of approximately 18%. To the best of our knowledge, the wavelength of 4496 nm with strong absorption in silica-based fibres is the longest emission wavelength from a CW fibre laser, and the span of 686 nm is also the largest tuning range achieved to date for any CW fibre laser. By further reducing the HCF transmission loss, increasing the pump power, improving the coupling efficiency, and optimizing the fibre length together with the pressure, the laser efficiency and output power are expected to increase significantly. This work opens new opportunities for broadly tunable high-power mid-IR fibre lasers, especially beyond 4 μm. Nature Publishing Group UK 2022-01-13 /pmc/articles/PMC8755826/ /pubmed/35022386 http://dx.doi.org/10.1038/s41377-021-00703-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Zhou, Zhiyue
Wang, Zefeng
Huang, Wei
Cui, Yulong
Li, Hao
Wang, Meng
Xi, Xiaoming
Gao, Shoufei
Wang, Yingying
Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title_full Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title_fullStr Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title_full_unstemmed Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title_short Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
title_sort towards high-power mid-ir light source tunable from 3.8 to 4.5 µm by hbr-filled hollow-core silica fibres
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8755826/
https://www.ncbi.nlm.nih.gov/pubmed/35022386
http://dx.doi.org/10.1038/s41377-021-00703-6
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