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

Zhiyue Zhou; Zefeng Wang; Wei Huang; Yulong Cui; Hao Li; Meng Wang; Xiaoming Xi; Shoufei Gao; Yingying Wang

doi:10.1038/s41377-021-00703-6

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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

Articles

- Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres
- Light: Science & Applications Vol. 11, Issue 1, Pages: 101-113(2022)
- Affiliations：
  
  1.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
  2.State Key Laboratory of Pulsed Power Laser Technology, Changsha, 410073, China
  3.Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, 410073, China
  4.Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- Author bio：
  
  Zefeng Wang (zefengwang_nudt@163.com)
- Funds：
- DOI：10.1038/s41377-021-00703-6
  CLC：
- Published：31 January 2022，
  
  Published Online：13 January 2022，
  
  Received：13 September 2021，
  
  Revised：09 December 2021，
  
  Accepted：23 December 2021
- Accepted：
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Zhou, Z. Y. et al. Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres. Light: Science & Applications, 11, 101-113 (2019).
DOI：

Zhou, Z. Y. et al. Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres. Light: Science & Applications, 11, 101-113 (2019). DOI： 10.1038/s41377-021-00703-6.

摘要

Abstract

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.

关键词

Keywords

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