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Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre

Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre
Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre
We present a novel metal coated triple clad active fibre design, utilising an all glass inner cladding structure and aluminium outer coating. This metal coated active fibre enables a number of benefits to high power laser design, such as increase robustness and extended operating temperature range. As a demonstration of the advantages of this design a passively cooled ytterbium fibre laser is presented. A 20 m length of active fibre was coiled into a planar arrangement and mounted onto a high emissivity heatsink. Up to 405 W of output power was achieved without the need for active water or forced air cooling. The slope efficiency of this source was 74 % and maximum outer heat sink temperature was ~140°C. This arrangement allowed for significant weight and size savings to be achieved with the active fibre laser head weighing less than 100 g. We will discuss the design choices and trade-offs of metal coated active fibre on high power fibre laser systems as well as the prospects for further power scaling to the kW level.
Fiber laser, directed energy systems, metal clad fibre lasers, high temperature fibre lasers
0277-786X
Daniel, Jae M.O.
6196e732-cd6c-43a7-bc9f-bc4f99e72c23
Simakov, Nikita
984eef10-d13b-4cc6-852f-bcc58b432832
Hemming, Alexander
2f1ab4dc-cda5-4e5e-be44-c8365a0f2345
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Haub, John
38366a29-41e6-4aae-893d-a56386bdfea3
Daniel, Jae M.O.
6196e732-cd6c-43a7-bc9f-bc4f99e72c23
Simakov, Nikita
984eef10-d13b-4cc6-852f-bcc58b432832
Hemming, Alexander
2f1ab4dc-cda5-4e5e-be44-c8365a0f2345
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Haub, John
38366a29-41e6-4aae-893d-a56386bdfea3

Daniel, Jae M.O., Simakov, Nikita, Hemming, Alexander, Clarkson, W.A. and Haub, John (2016) Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre. Proceedings of SPIE, 9728. (doi:10.1117/12.2210887).

Record type: Article

Abstract

We present a novel metal coated triple clad active fibre design, utilising an all glass inner cladding structure and aluminium outer coating. This metal coated active fibre enables a number of benefits to high power laser design, such as increase robustness and extended operating temperature range. As a demonstration of the advantages of this design a passively cooled ytterbium fibre laser is presented. A 20 m length of active fibre was coiled into a planar arrangement and mounted onto a high emissivity heatsink. Up to 405 W of output power was achieved without the need for active water or forced air cooling. The slope efficiency of this source was 74 % and maximum outer heat sink temperature was ~140°C. This arrangement allowed for significant weight and size savings to be achieved with the active fibre laser head weighing less than 100 g. We will discuss the design choices and trade-offs of metal coated active fibre on high power fibre laser systems as well as the prospects for further power scaling to the kW level.

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More information

Published date: 2016
Venue - Dates: SPIE Photonics West 2016, United States, 2016-02-13 - 2016-02-18
Keywords: Fiber laser, directed energy systems, metal clad fibre lasers, high temperature fibre lasers

Identifiers

Local EPrints ID: 415555
URI: https://eprints.soton.ac.uk/id/eprint/415555
ISSN: 0277-786X
PURE UUID: 09629dcf-98bc-4d67-a88c-9b2e04a165cc

Catalogue record

Date deposited: 15 Nov 2017 17:30
Last modified: 05 Oct 2018 11:57

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