title: 12  mJ kW-class ultrafast fiber laser system using multidimensional coherent pulse addition.
abstract: An ultrafast fiber-chirped-pulse amplification system using a combination of spatial and temporal coherent pulse combination is presented. By distributing the amplification among eight amplifier channels and four pulse replicas, up to 12 mJ pulse energy with 700 W average power and 262 fs pulse duration have been obtained with a system efficiency of 78% and excellent beam quality. To the best of our knowledge, this is the highest energy achieved by an ultrafast fiber-based laser system to date.
authors.forename: Marco
authors.initials: M
authors.lastname: Kienel
authors.forename: Michael
authors.initials: M
authors.lastname: Müller
authors.forename: Arno
authors.initials: A
authors.lastname: Klenke
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann