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Proceedings Paper

Power scaling of cladding-pumped Er,Yb-doped fiber lasers at 1.5 µm
Author(s): W. Andrew Clarkson; Deyuan Shen; Pu Wang; Laurence J. Cooper; Johan Nilsson; Jayanta K. Sahu
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Paper Abstract

An efficient double-clad erbium-ytterbium co-doped fiber laser pumped by two high-power diode-stacks at 975nm is reported. Using a simple external cavity configuration at one end of the fiber and the 3.6% Fresnel reflection from a cleaved fiber end facet at the opposite end of the fiber to provide the necessary feedback for lasing, we obtained a maximum output power of 159W at 1565nm in a beam with beam quality factor (M2) ~1.9 for 466W of launched pump power. The corresponding slope efficiency with respect to launched pump power was 34%. The maximum output power was limited by the available pump power. A strategy for increasing the output power and improving the beam quality based on the use of a double-clad fiber design with a helical-core trajectory is considered.

Paper Details

Date Published: 11 October 2005
PDF: 10 pages
Proc. SPIE 5958, Lasers and Applications, 59580O (11 October 2005); doi: 10.1117/12.623660
Show Author Affiliations
W. Andrew Clarkson, Univ. of Southampton (United Kingdom)
Deyuan Shen, Univ. of Southampton (United Kingdom)
Pu Wang, Univ. of Southampton (United Kingdom)
Laurence J. Cooper, Univ. of Southampton (United Kingdom)
Johan Nilsson, Univ. of Southampton (United Kingdom)
Jayanta K. Sahu, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 5958:
Lasers and Applications
Krzysztof M. Abramski; Antonio Lapucci; Edward F. Plinski, Editor(s)

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