title: Multidimensional coherent pulse addition of ultrashort laser pulses.
abstract: Spatially and temporally separated amplification and subsequent coherent addition of femtosecond pulses is a promising performance-scaling approach for ultrafast laser systems. Herein we demonstrate for the first time the application of this multidimensional scheme in a scalable architecture. Applying actively controlled divided-pulse amplification producing up to four pulse replicas that are amplified in two ytterbium-doped step-index fibers (6 μm core), pulse energies far beyond the damage threshold of the single fiber have been achieved. In this proof-of-principle experiment, high system efficiencies are demonstrated at both high pulse energies (i.e., in case of strong saturation) and high accumulated nonlinear phases.
authors: Marco
authors: M
authors: Kienel
authors: Michael
authors: M
authors: Müller
authors: Arno
authors: A
authors: Klenke
authors: Tino
authors: T
authors: Eidam
authors: Jens
authors: J
authors: Limpert
authors: Andreas
authors: A
authors: Tünnermann
mesh_terms: D000669:Amplifiers, Electronic; D007834:Lasers; D055100:Optical Fibers; D013997:Time Factors