Monolithic highly-efficient 272 W nested-ring structured-core thulium fibre laser at 1940 nm
Monolithic highly-efficient 272 W nested-ring structured-core thulium fibre laser at 1940 nm
A novel, to the best of our knowledge, thulium-doped silica fiber with a non-uniform core doping profile has been utilized to demonstrate a high-power monolithic laser oscillator system. The fiber laser achieved a continuous-wave (CW) output power of 272W at 1940nm with slope efficiencies of 68% and 71% with respect to launched and absorbed pump power, respectively. This novel Tm fiber design enabled the generation of the highest reported output power from a single-mode, small core (<15µm diameter) non-pedestal fiber. Moreover, the slope efficiency achieved is the maximum reported to date for a single-mode thulium fiber laser operating at >100 W output power level.
5614-5617
Svejkar, Richard
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Buckthorpe, Martin P.
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Svejkarova, Bara
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Shardlow, Peter C.
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Clarkson, W. Andrew
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4 September 2025
Svejkar, Richard
e22194cd-6046-4f2f-b644-af922bec55c8
Buckthorpe, Martin P.
18af650a-3b3a-4830-9976-9f34062a487b
Svejkarova, Bara
6438556a-5de1-40cf-a56c-1fa791a690bc
Shardlow, Peter C.
9ca17301-8ae7-4307-8bb9-371df461520c
Clarkson, W. Andrew
3b060f63-a303-4fa5-ad50-95f166df1ba2
Svejkar, Richard, Buckthorpe, Martin P., Svejkarova, Bara, Shardlow, Peter C. and Clarkson, W. Andrew
(2025)
Monolithic highly-efficient 272 W nested-ring structured-core thulium fibre laser at 1940 nm.
Optics Letters, 50 (18), .
(doi:10.1364/ol.566019).
Abstract
A novel, to the best of our knowledge, thulium-doped silica fiber with a non-uniform core doping profile has been utilized to demonstrate a high-power monolithic laser oscillator system. The fiber laser achieved a continuous-wave (CW) output power of 272W at 1940nm with slope efficiencies of 68% and 71% with respect to launched and absorbed pump power, respectively. This novel Tm fiber design enabled the generation of the highest reported output power from a single-mode, small core (<15µm diameter) non-pedestal fiber. Moreover, the slope efficiency achieved is the maximum reported to date for a single-mode thulium fiber laser operating at >100 W output power level.
Text
ol-50-18-5614
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Accepted/In Press date: 25 June 2025
Published date: 4 September 2025
Identifiers
Local EPrints ID: 505397
URI: http://eprints.soton.ac.uk/id/eprint/505397
ISSN: 0146-9592
PURE UUID: a67ace5e-63df-4509-9836-90bf01700f9d
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Date deposited: 07 Oct 2025 17:02
Last modified: 08 Oct 2025 02:09
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Contributors
Author:
Richard Svejkar
Author:
Martin P. Buckthorpe
Author:
Bara Svejkarova
Author:
Peter C. Shardlow
Author:
W. Andrew Clarkson
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