Authors: M. A. Jebali, J.-N.Maran , S. LaRochelle, S. Chatigny , M. A. Lapointe and E. Gagnon
A high power, high efficiency, Erbium doped fiber laser with in-band cladding pumping is demonstrated is this paper. Pump-limited, 103 W output power is reported with a record efficiency of 75% with respect to the launched pump power. This is, to the best of our knowledge, the highest efficiency ever recorded for an all-fiber in-band cladding-pumped Er-doped fiber laser.