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Efficient single-mode operation of a cladding-pumped ytterbium-doped helical-core fiber laser

Wang, P., Cooper, L.J., Sahu, J.K. and Clarkson, W.A. (2006) Efficient single-mode operation of a cladding-pumped ytterbium-doped helical-core fiber laser Optics Letters, 31, (2), pp. 226-228. (doi:10.1364/OL.31.000226).

Record type: Article

Abstract

A novel approach to achieving robust single-spatial-mode operation of cladding-pumped fiber lasers with multimode cores is reported. The approach is based on the use of a fiber geometry in which the core has a helical trajectory within the inner cladding to suppress laser oscillation on higher-order modes. In a preliminary proof-of-principle study, efficient single-mode operation of a cladding-pumped ytterbium-doped helical-core fiber laser with a 30µm diameter core and a numerical aperture of 0.087 has been demonstrated.

The laser yielded 60.4 W of output at 1043 nm in a beam with M2<1.4 for 92.6 W launched pump power from a diode stack at 976 nm. The slope efficiency at pump powers well above threshold was 84%, which compares favorably with the slope efficiencies achievable with conventional straight-core Yb-doped double-clad fiber lasers.

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More information

Published date: 15 January 2006
Keywords: lasers and laser optics, diode-pumped, fiber, single-mode

Identifiers

Local EPrints ID: 39303
URI: http://eprints.soton.ac.uk/id/eprint/39303
ISSN: 0146-9592
PURE UUID: 011d1896-1c09-44c8-b6c4-d535788cebcf

Catalogue record

Date deposited: 27 Jun 2006
Last modified: 17 Jul 2017 15:37

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