title: Wavefront control of a multicore ytterbium-doped pulse fiber amplifier by digital holography.
abstract: We demonstrate the active wavefront control of a 19-core ytterbium-doped fiber amplifier by the digital holography technique. The output wavefront is corrected even in the presence of large externally induced perturbations, with a measured output Strehl ratio of 0.6 in all cases. The wavefront-controlled multicore fiber is used to amplify 800 ps pulses at 1064 nm at a repetition rate of 40?kHz, and a gain of 23 dB is obtained.
authors.affiliation: Laboratoire Charles Fabry de l'Institut d'Optique, Campus Polytechnique, RD 128, 91127 Palaiseau Cedex, France. Mathieu.paurisse@institutoptique.fr
authors.forename: Mathieu
authors.initials: M
authors.lastname: Paurisse
authors.forename: Marc
authors.initials: M
authors.lastname: Hanna
authors.forename: Frédéric
authors.initials: F
authors.lastname: Druon
authors.forename: Patrick
authors.initials: P
authors.lastname: Georges