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Tunable holmium-doped fiber laser with multi-watt operation from 2025 nm to 2200 nm

Tunable holmium-doped fiber laser with multi-watt operation from 2025 nm to 2200 nm
Tunable holmium-doped fiber laser with multi-watt operation from 2025 nm to 2200 nm
The emission band of holmium-doped silica fibers extends beyond 2200 nm, which means these lasers have potential of covering considerable parts of the atmospheric transmission window between 2100 nm and 2250 nm. However, efficient operation towards 2200 nm is challenging due to absorption in fused silica at the laser wavelength. Here we present a holmium-doped fiber laser specifically targeting long wavelength operation. The laser is implemented as a high-feedback wavelength selective ring cavity, and is tunable from 2025 nm to 2200 nm. A maximum slope efficiency of 58% is obtained at 2050 nm, and a slope of 27% at 2200 nm. A power of 5.5Wfrom a single aperture (8.9W total) is demonstrated at 2200 nm. Our results represent extended coverage of the 2μm spectral band with multiwatt- level silica fiber lasers.
Fibre lasers
0146-9592
1-4
Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2
Holmen, Lars Gronmark
16f7fd2c-6d1f-4c4d-a3ba-6c4a7784b5d8
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Simakov, Nikita
984eef10-d13b-4cc6-852f-bcc58b432832
Hemming, A
68215ff2-b41f-42b0-bebb-d589ae97b5bb
Clarkson, William
3b060f63-a303-4fa5-ad50-95f166df1ba2
Holmen, Lars Gronmark
16f7fd2c-6d1f-4c4d-a3ba-6c4a7784b5d8
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Simakov, Nikita
984eef10-d13b-4cc6-852f-bcc58b432832
Hemming, A
68215ff2-b41f-42b0-bebb-d589ae97b5bb

Clarkson, William, Holmen, Lars Gronmark, Shardlow, Peter, Barua, Pranabesh, Sahu, Jayanta, Simakov, Nikita and Hemming, A (2019) Tunable holmium-doped fiber laser with multi-watt operation from 2025 nm to 2200 nm. Optics Letters, 44 (17), 1-4. (doi:10.1364/OL.44.004131).

Record type: Article

Abstract

The emission band of holmium-doped silica fibers extends beyond 2200 nm, which means these lasers have potential of covering considerable parts of the atmospheric transmission window between 2100 nm and 2250 nm. However, efficient operation towards 2200 nm is challenging due to absorption in fused silica at the laser wavelength. Here we present a holmium-doped fiber laser specifically targeting long wavelength operation. The laser is implemented as a high-feedback wavelength selective ring cavity, and is tunable from 2025 nm to 2200 nm. A maximum slope efficiency of 58% is obtained at 2050 nm, and a slope of 27% at 2200 nm. A power of 5.5Wfrom a single aperture (8.9W total) is demonstrated at 2200 nm. Our results represent extended coverage of the 2μm spectral band with multiwatt- level silica fiber lasers.

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More information

Submitted date: 28 June 2019
Accepted/In Press date: 23 July 2019
e-pub ahead of print date: 21 August 2019
Published date: 1 September 2019
Keywords: Fibre lasers

Identifiers

Local EPrints ID: 433776
URI: https://eprints.soton.ac.uk/id/eprint/433776
ISSN: 0146-9592
PURE UUID: c0736da4-9d76-4be5-b9e6-6797474c4ae5
ORCID for Peter Shardlow: ORCID iD orcid.org/0000-0003-0459-0581

Catalogue record

Date deposited: 03 Sep 2019 16:30
Last modified: 08 Oct 2019 00:38

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