Title :
810 W continuous-wave and single-transverse-mode fibre laser using 20 /spl mu/m core Yb-doped double-clad fibre
Author :
Liu, C.-H. ; Ehlers, B. ; Doerfel, F. ; Heinemann, S. ; Carter, A. ; Tankala, K. ; Farroni, J. ; Galvanauskas, A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
It is shown that continuous-wave kW-power fibre lasers can be built using double-clad fibres with relatively small cores. 810 W in a single-transverse-mode output (M/sup 2/=1.27) is demonstrated experimentally with 20 /spl mu/m core low-NA (NA=0.06) Yb-doped double-clad fibre. A laser numerical model matches experimental results and predicts scalability of achievable powers into a multi-kW range.
Keywords :
fibre lasers; laser modes; optical fibre cladding; ytterbium; 20 micron; 810 W; Yb doped double clad fibre; continuous wave fibre laser; power fibre lasers; scalability; single transverse mode fibre laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20046464
