Highly efficient side-fused signal pump combiners based on CO2-laser restructured optical fibersE. Brockmüller, L. Kleihaus, F. Wellmann, R. Lachmayer, J. Neumann and Kracht D.EPJ Web Conf., 267 (2022) 02008DOI: https://doi.org/10.1051/epjconf/202226702008