title: Highly efficient optically pumped vertical-emitting semiconductor laser with more than 20 W average output power in a fundamental transverse mode.
abstract: We have demonstrated an optically pumped vertical-external-cavity surface-emitting laser (OP-VECSEL) generating more than 20 W of cw output power in a fundamental transverse mode (M2 approximately 1.1) at 960 nm. The laser is highly efficient with a slope efficiency of 49%, a pump threshold of 4.4 W, and an overall optical-to-optical efficiency of 43%.
authors.affiliation: Department of Physics, Institute of Quantum Electronics, ETH Zürich, Zürich, Switzerland. rudin@phys.ethz.ch
authors.forename: B
authors.initials: B
authors.lastname: Rudin
authors.forename: A
authors.initials: A
authors.lastname: Rutz
authors.forename: M
authors.initials: M
authors.lastname: Hoffmann
authors.forename: D J H C
authors.initials: DJ
authors.lastname: Maas
authors.forename: A-R
authors.initials: AR
authors.lastname: Bellancourt
authors.forename: E
authors.initials: E
authors.lastname: Gini
authors.forename: T
authors.initials: T
authors.lastname: Südmeyer
authors.forename: U
authors.initials: U
authors.lastname: Keller