Cladding-pumped ytterbium-doped fiber laser with radially polarized output

A simple technique for directly generating a radially polarized output beam from a cladding-pumped ytterbium-doped fiber laser is reported. Our approach is based on the use of a nanograting spatially variant waveplate as an intracavity polarization-controlling element. The laser yielded ~32 W of out...

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Bibliographic Details
Published in:Optics letters 2014-09, Vol.39 (18), p.5359-5361
Main Authors: Lin, Di, Daniel, J M O, Gecevičius, M, Beresna, M, Kazansky, P G, Clarkson, W A
Format: Article
Language:English
Subjects:
Beams (radiation)
Cladding
Fiber lasers
Laser beams
Lasers
Nanostructure
Polarization
Pumps
Slopes
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Summary:A simple technique for directly generating a radially polarized output beam from a cladding-pumped ytterbium-doped fiber laser is reported. Our approach is based on the use of a nanograting spatially variant waveplate as an intracavity polarization-controlling element. The laser yielded ~32 W of output power (limited by available pump power) with a radially polarized TM (01)-mode output beam at 1040 nm with a corresponding slope efficiency of 66% and a polarization purity of 95%. The beam-propagation factor (M(2)) was measured to be ~1.9-2.1.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.005359