title: Pump and signal combiner for bi-directional pumping of all-fiber lasers and amplifiers.
abstract: We developed an all-fiber component with a signal feedthrough capable of combining up to 6 fiber-coupled multi-mode pump sources to a maximum pump power of 400 W at efficiencies in the range of 89 to 95%, providing the possibility of transmitting a high power signal in forward and in reverse direction. Hence, the fiber combiner can be implemented in almost any fiber laser or amplifier architecture. The complete optical design of the combiner was developed based on ray tracing simulations and confirmed by experimental results.
authors.affiliation: Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany. t.theeg@lzh.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Theeg
authors.forename: Hakan
authors.initials: H
authors.lastname: Sayinc
authors.forename: Jörg
authors.initials: J
authors.lastname: Neumann
authors.forename: Ludger
authors.initials: L
authors.lastname: Overmeyer
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kracht
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D014159:Transducers