title: Cladding-pumped ytterbium-doped fiber laser with radially polarized output.
abstract: 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.
authors.forename: Di
authors.initials: D
authors.lastname: Lin
authors.forename: J M O
authors.initials: JM
authors.lastname: Daniel
authors.forename: M
authors.initials: M
authors.lastname: Gecevičius
authors.forename: M
authors.initials: M
authors.lastname: Beresna
authors.forename: P G
authors.initials: PG
authors.lastname: Kazansky
authors.forename: W A
authors.initials: WA
authors.lastname: Clarkson