Coherent combining in an Yb doped double core fiber laser
Johan Boullet, David Sabourdy, Agnès Desfarges-Berthelemot, Vincent Kermène, Dominique Pagnoux, Philippe Roy, Bernard Dussardier, Wilfried Blanc
Abstract
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 on 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.