Coherent combining is demonstrated in a clad-pumped Yb-doped double-core fiber laser. A slope efficiency of more than 70% is achieved with 96% of the total output power in the fundamental mode of one of the two cores. This high combining efficiency is obtained when both cores are coupled via a biconical fused taper in a Michelson interferometer configuration.
© 2005 Optical Society of America
Johan Boullet, David Sabourdy, Agnès Desfarges-Berthelemot, Vincent Kermène, Dominique Pagnoux, Philippe Roy, Bernard Dussardier, and Wilfried Blanc, "Coherent combining in an Yb-doped double-core fiber laser," Opt. Lett. 30, 1962-1964 (2005)