title: Thin-disk laser operation of Pr³⁺,Mg²⁺:SrAl₁₂O₁₉.
abstract: We present first results in applying the thin-disk concept to lasers directly emitting in the visible spectral range. The pump light was provided by 24 InGaN laser diodes emitting 1 W each at 444 nm, which were coupled into a 200 μm fiber. A 300 μm thin Pr3+,Mg2+:SrAl12O19 crystal served as gain medium. In continuous-wave operation an output power of 0.88 W and a slope efficiency of 12% with respect to the absorbed pump power were achieved at an emission wavelength of 643.5 nm. Modulating the pump source at a duty cycle of 10% yielded an instantaneous output power of 1.67 W, corresponding to a slope efficiency of 26%.
authors.forename: Andreas
authors.initials: A
authors.lastname: Voss
authors.forename: Fabian
authors.initials: F
authors.lastname: Reichert
authors.forename: Philip Werner
authors.initials: PW
authors.lastname: Metz
authors.forename: Daniel-Timo
authors.initials: DT
authors.lastname: Marzahl
authors.forename: Christian
authors.initials: C
authors.lastname: Kränkel
authors.forename: Günter
authors.initials: G
authors.lastname: Huber
authors.forename: Thomas
authors.initials: T
authors.lastname: Graf
mesh_terms: D053844:Lasers, Solid-State; D013499:Surface Properties; D013696:Temperature