title: Red and orange laser operation of Pr:KYF4 pumped by a Nd:YAG/LBO laser at 469.1 nm and a InGaN laser diode at 444 nm.
abstract: We report the basic luminescence properties and the continuous-wave (CW) laser operation of a Pr(3+)-doped KYF(4) single crystal in the Red and Orange spectral regions by using a new pumping scheme. The pump source is an especially developed, compact, slightly tunable and intra-cavity frequency-doubled diode-pumped Nd:YAG laser delivering a CW output power up to about 1.4 W around 469.1 nm. At this pump wavelength, red and orange laser emissions are obtained at about 642.3 and 605.5 nm, with maximum output powers of 11.3 and 1 mW and associated slope efficiencies of 9.3% and 3.4%, with respect to absorbed pump powers, respectively. For comparison, the Pr:KYF(4) crystal is also pumped by a InGaN blue laser diode operating around 444 nm. In this case, the same red and orange lasers are obtained, but with maximum output powers of 7.8 and 2 mW and the associated slope efficiencies of 7 and 5.8%, respectively. Wavelength tuning for the two lasers is demonstrated by slightly tilting the crystal. Orange laser operation and laser wavelength tuning are reported for the first time.
authors.affiliation: Centre de Recherche sur les Ions, les Matériaux et la Photonique, UMR 6252 CEA-CNRS-ENSICaen, Université de Caen Basse-Normandie, 14050 Caen, France.
authors.forename: B
authors.initials: B
authors.lastname: Xu
authors.forename: F
authors.initials: F
authors.lastname: Starecki
authors.forename: D
authors.initials: D
authors.lastname: Pabœuf
authors.forename: P
authors.initials: P
authors.lastname: Camy
authors.forename: J L
authors.initials: JL
authors.lastname: Doualan
authors.forename: Z P
authors.initials: ZP
authors.lastname: Cai
authors.forename: A
authors.initials: A
authors.lastname: Braud
authors.forename: R
authors.initials: R
authors.lastname: Moncorgé
authors.forename: Ph
authors.initials: P
authors.lastname: Goldner
authors.forename: F
authors.initials: F
authors.lastname: Bretenaker