Monolithic all-glass pump combiner scheme for high-power fiber laser systems.
We report on an integrated all-glass pump combiner for ytterbium-doped high power fiber lasers. The combining of multiple pump fibers with an active double clad fiber for high power amplification was successfully achieved by splicing them to a dichromatically coated planar convex lens. The measured coupling efficiency of such a combining scheme was typically in excess of 80%, with 86.5% achieved in maximum. Theoretical analysis is discussed in order to get optimized parameters and to consider the scaling of this type of coupler to higher average powers.
Kim
Jun Ki
JK
Fraunhofer Institute for Applied Optics and Precision Engineering Beutenberg Campus, Albert-Einstein St. 7, 07745 Jena, Germany.
Hagemann
Christian
C
Schreiber
Thomas
T
Peschel
Thomas
T
Böhme
Steffen
S
Eberhardt
Ramona
R
Tünnermann
Andreas
A