High-power Yb-doped multicore ribbon fiber laser.
A highly elongated double-clad ribbon fiber that comprises a pure-silica inner cladding with transverse dimensions of approximately 1.4 mm by 0.23 mm with a linear array of ten ytterbium-doped cores has been fabricated and operated in a simple laser configuration pumped by two diode stacks. The fiber laser yielded 320 W of output power at a center wavelength of 1045 nm in a combined beam with beam propagation factors of approximately 2 (perpendicular to the array) and approximately 150 (parallel to the array) for 576 W of launched pump power. The slope efficiency with respect to absorbed pump power was 62%. The prospects for further power scaling and improved beam quality and efficiency are discussed.
Cooper
L J
LJ
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
Wang
P
P
Williams
R B
RB
Sahu
J K
JK
Clarkson
W A
WA
Scott
A M
AM
Jones
D
D