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Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nm

Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nm
Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nm
Strong C-H bond absorption [1], and moderate water absorption in the spectral region around ~1.7 μm make this wavelength band of interest for a range of applications, including polymer processing and laser surgery [2]. Despite being a growing area of interest, development of high-power laser sources in this region has been limited. Daniel et al [3], showed that high-power, continuous-wave generation between 1.66 - 1.75 μm could be achieved by in-band pumping thulium-doped fibre (TDF) at 1565 nm using an erbium/ytterbium co-doped (Er/Yb) fibre laser, displaying 12.6 W at 1726 nm. Yb is added as a co-dopant to Er-doped fibres (EDF) to increase pump absorption efficiency. However, parasitic lasing in the Yb emission band at 1 μm can limit efficiency and the onset of self-pulsing can cause catastrophic damage, limiting single-mode output power and operating lifetimes. Here we report the use of a cladding-pumped Er-only fibre laser (EDFL) to core pump a thulium-doped fibre laser (TDFL), efficiently generating >25 W of single-mode output at 1726 nm.
Thulium, Thulium fiber, fiber laser, single-mode, erbium, erbium-only, yb-free
OSA
Burns, Mark
7f7ca346-f31a-46cf-a848-acb4bcae18b9
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Jefferson-Brain, Thomas, Lewis
8bce2a02-37a4-4277-a8cb-0c40bde57837
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2
Burns, Mark
7f7ca346-f31a-46cf-a848-acb4bcae18b9
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Jefferson-Brain, Thomas, Lewis
8bce2a02-37a4-4277-a8cb-0c40bde57837
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2

Burns, Mark, Shardlow, Peter, Barua, Pranabesh, Jefferson-Brain, Thomas, Lewis, Sahu, Jayanta and Clarkson, William (2019) Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nm. In OSA Technical Digest: 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference. OSA..

Record type: Conference or Workshop Item (Paper)

Abstract

Strong C-H bond absorption [1], and moderate water absorption in the spectral region around ~1.7 μm make this wavelength band of interest for a range of applications, including polymer processing and laser surgery [2]. Despite being a growing area of interest, development of high-power laser sources in this region has been limited. Daniel et al [3], showed that high-power, continuous-wave generation between 1.66 - 1.75 μm could be achieved by in-band pumping thulium-doped fibre (TDF) at 1565 nm using an erbium/ytterbium co-doped (Er/Yb) fibre laser, displaying 12.6 W at 1726 nm. Yb is added as a co-dopant to Er-doped fibres (EDF) to increase pump absorption efficiency. However, parasitic lasing in the Yb emission band at 1 μm can limit efficiency and the onset of self-pulsing can cause catastrophic damage, limiting single-mode output power and operating lifetimes. Here we report the use of a cladding-pumped Er-only fibre laser (EDFL) to core pump a thulium-doped fibre laser (TDFL), efficiently generating >25 W of single-mode output at 1726 nm.

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More information

Published date: 27 June 2019
Venue - Dates: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 2019-06-23 - 2019-06-27
Keywords: Thulium, Thulium fiber, fiber laser, single-mode, erbium, erbium-only, yb-free

Identifiers

Local EPrints ID: 434547
URI: https://eprints.soton.ac.uk/id/eprint/434547
PURE UUID: 4975912b-f230-4e1d-adc8-aa77088d8867
ORCID for Mark Burns: ORCID iD orcid.org/0000-0003-2039-6025
ORCID for Peter Shardlow: ORCID iD orcid.org/0000-0003-0459-0581
ORCID for Thomas, Lewis Jefferson-Brain: ORCID iD orcid.org/0000-0002-8838-5640

Catalogue record

Date deposited: 01 Oct 2019 16:30
Last modified: 28 Nov 2019 01:33

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