Nested-ring doping for highly efficient 1907 nm short-wavelength cladding-pumped thulium fiber lasers
Nested-ring doping for highly efficient 1907 nm short-wavelength cladding-pumped thulium fiber lasers
Cladding-pumped Tm-doped fiber lasers operating below 1950 nm have difficulty matching the high-efficiency, power-scalable output that can be achieved at longer wavelengths. This challenge arises due to the strong three-level behavior at short wavelengths and strong competition from higher-gain long wavelength emission. In this Letter, we demonstrate a nested-ring fiber design in which a highly doped Tm ring is embedded within a larger undoped core. The fiber is specifically tailored for highly efficient and high power short-wavelength operation (<1950 nm). The nested-ring Tm fiber laser has generated 62 W of single-mode 1907 nm output with up to 65% (70%) slope efficiency with respect to launched (absorbed)pumppower.
5542-5545
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
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Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2
30 September 2020
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2
Barber, Matthew James, Shardlow, Peter, Barua, Pranabesh, Sahu, Jayanta and Clarkson, William
(2020)
Nested-ring doping for highly efficient 1907 nm short-wavelength cladding-pumped thulium fiber lasers.
Optics Letters, 45 (19), .
(doi:10.1364/OL.401228).
Abstract
Cladding-pumped Tm-doped fiber lasers operating below 1950 nm have difficulty matching the high-efficiency, power-scalable output that can be achieved at longer wavelengths. This challenge arises due to the strong three-level behavior at short wavelengths and strong competition from higher-gain long wavelength emission. In this Letter, we demonstrate a nested-ring fiber design in which a highly doped Tm ring is embedded within a larger undoped core. The fiber is specifically tailored for highly efficient and high power short-wavelength operation (<1950 nm). The nested-ring Tm fiber laser has generated 62 W of single-mode 1907 nm output with up to 65% (70%) slope efficiency with respect to launched (absorbed)pumppower.
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Accepted/In Press date: 25 August 2020
Published date: 30 September 2020
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Funding Information:
Acknowledgment. This work was supported by funding from the Defence Science and Technology Laboratory (Dstl, UK) and the Defence Science and Technology group (DST, Australia). M. J. B. acknowledges financial support from the Engineering and Physical Sciences Research Council (EPSRC, UK) and Leonardo, UK. The figure data can be found at https://doi.org/10.5258/SOTON/D1443.
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© 2020 Optical Society of America.
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Local EPrints ID: 443874
URI: http://eprints.soton.ac.uk/id/eprint/443874
ISSN: 0146-9592
PURE UUID: e150a3d0-c4b8-44e4-ade6-00cb720bb470
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Date deposited: 15 Sep 2020 16:34
Last modified: 28 Oct 2022 04:06
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Author:
Pranabesh Barua
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