title: Experimental demonstration of novel end-pumping method for double-clad fiber devices.
abstract: We present experimental demonstration of an end-pumping scheme based on splicing the multimode pump and single-mode signal fibers directly to a double-clad fiber with a tailored cross section. The method is used to pump a double-clad, erbium- and ytterbium-doped, fiber ring laser. The efficiency of the end-pumping method is tested by determining the slope efficiencies of the fiber ring laser and the fiber laser in a Fabry-Perot configuration. Comparable slope efficiencies are found when both laser configurations have similar output coupler ratios. The developed pumping scheme and double-clad fiber can find applications in cost-effective power fiber amplifiers and lasers.
authors.affiliation: Institute of Radio Engineering and Electronics, Academy of Sciences, Chaberská 57, 18251 Prague, Czech Republic.
authors.forename: Pavel
authors.initials: P
authors.lastname: Peterka
authors.forename: Ivan
authors.initials: I
authors.lastname: Kasík
authors.forename: Vlastimil
authors.initials: V
authors.lastname: Mat Jec
authors.forename: Václav
authors.initials: V
authors.lastname: Kube Ek
authors.forename: Pavel
authors.initials: P
authors.lastname: Dvo A Ek