title: Yellow laser performance of Dy³⁺ in co-doped Dy,Tb:LiLuF₄.
abstract: We present laser results obtained from a Dy³⁺-Tb³⁺ co-doped LiLuF₄ crystal, pumped by a blue emitting InGaN laser diode, aiming for generation of a compact 578 nm source. We exploit the yellow Dy³⁺ transition ⁴F(9/2)⇒⁶H(13/2) to generate yellow laser emission. The lifetime of the lower laser level is quenched, via energy transfer, to co-doped Tb³⁺ ions in the fluoride crystal. We report the growth technique, spectroscopic study, and room temperature continuous wave laser results in a hemispherical cavity at 574 nm, and with a highly reflective output coupler at 578 nm. A yellow laser at 578 nm is very relevant for metrological applications, in particular for pumping of the forbidden ¹S₀-³P₀ ytterbium clock transition, which is recommended as a secondary representation of the second in the international system of units.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Bolognesi
authors.forename: Daniela
authors.initials: D
authors.lastname: Parisi
authors.forename: Davide
authors.initials: D
authors.lastname: Calonico
authors.forename: Giovanni Antonio
authors.initials: GA
authors.lastname: Costanzo
authors.forename: Filippo
authors.initials: F
authors.lastname: Levi
authors.forename: Philip Werner
authors.initials: PW
authors.lastname: Metz
authors.forename: Christian
authors.initials: C
authors.lastname: Kränkel
authors.forename: Günter
authors.initials: G
authors.lastname: Huber
authors.forename: Mauro
authors.initials: M
authors.lastname: Tonelli