656W Er-doped, Yb-free large-core fiber laser
656W Er-doped, Yb-free large-core fiber laser
A continuous-wave erbium-doped ytterbium-free fiber laser generates a record-breaking pump-power-limited output power of 656 W at ~1601 nm when cladding-pumped by 0.98 μm diode lasers. The slope efficiency was 35.6% with respect to launched pump power, and the beam quality factor (M2) was ~10.5. This M2 value excludes a fraction ~25% of the power which emerged from the cladding, which we attribute in part to mode coupling between the 146 μm core and 700 μm inner cladding. Whereas these parameters are adequate for in-band tandem pumping of Tm-doped fiber lasers, we predict that an output power of over 1 kW is possible by pumping with state-of-the-art 0.98 μm diode lasers, even with a smaller core that allows for improved beam quality.
3080-3083
Lin, Huaiqin
0e8f318a-0864-4c8f-803b-9fd9f13009f5
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
1 July 2018
Lin, Huaiqin
0e8f318a-0864-4c8f-803b-9fd9f13009f5
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Lin, Huaiqin, Feng, Yujun, Feng, Yutong, Barua, Pranabesh, Sahu, Jayanta and Nilsson, Johan
(2018)
656W Er-doped, Yb-free large-core fiber laser.
Optics Letters, 43 (13), .
(doi:10.1364/OL.43.003080).
Abstract
A continuous-wave erbium-doped ytterbium-free fiber laser generates a record-breaking pump-power-limited output power of 656 W at ~1601 nm when cladding-pumped by 0.98 μm diode lasers. The slope efficiency was 35.6% with respect to launched pump power, and the beam quality factor (M2) was ~10.5. This M2 value excludes a fraction ~25% of the power which emerged from the cladding, which we attribute in part to mode coupling between the 146 μm core and 700 μm inner cladding. Whereas these parameters are adequate for in-band tandem pumping of Tm-doped fiber lasers, we predict that an output power of over 1 kW is possible by pumping with state-of-the-art 0.98 μm diode lasers, even with a smaller core that allows for improved beam quality.
Text
ol-43-13-3080 656 W Er-doped, Yb-free large-core fiber laser
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Accepted/In Press date: 16 April 2018
e-pub ahead of print date: 21 June 2018
Published date: 1 July 2018
Identifiers
Local EPrints ID: 420460
URI: http://eprints.soton.ac.uk/id/eprint/420460
ISSN: 0146-9592
PURE UUID: b1299869-1107-4d42-a505-e00eb5fd4034
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Date deposited: 08 May 2018 16:30
Last modified: 16 Mar 2024 03:20
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