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High energy single transverse mode Q-switched fiber laser based on multi-mode large mode area erbium doped fiber

By H.L. Offerhaus, N.G.R. Broderick, D.J. Richardson, R.A. Sammut, J. Caplen and L. Dong

Abstract

We demonstrate that appropriately designed doped multi-mode fibers provide robust single mode output when used within a fiber laser cavity. Using a novel large mode area fiber we demonstrate record single mode (M2 < 1.2) pulse energies of > 0.5mJ from a Q-switched fiber laser and even higher pulse energies (as high as 0.85mJ) with slightly compromised spatial mode quality (M2 < 2.0). The approach offers significant scope for extending the range of single mode output powers and energies achievable from fiber laser/amplifier systems

Topics: QC, TK
Year: 1998
OAI identifier: oai:eprints.soton.ac.uk:77859
Provided by: e-Prints Soton
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