title: Properties of Nd3+-doped and undoped tetragonal PbWO4, NaY(WO4)2, CaWO4, and undoped monoclinic ZnWO4 and CdWO4 as laser-active and stimulated raman scattering-active crystals.
abstract: Spectroscopic, laser, and chi((3)) nonlinear optical properties of tetragonal PbWO(4), NaY(WO(4))(2), CaWO(4), and monoclinic CdWO(4) and ZnWO(4) were investigated. Particular attention was paid to Nd(3+)-doped and undoped PbWO(4) and NaY(WO(4))(2) crystals. Their absorption and luminescence intensity characteristics, including the peak cross sections of induced transitions, were determined. Pulsed and continuous-wave lasing in the two 4F(3/2)-->4I(11/2) and 4F(3/2)-->4I(13/2) channels was excited. For these five tungstates, highly efficient (greater than 50%) multiple Stokes generation and anti-Stokes picosecond generation were achieved. All the observed scattered laser components were identified. These results were analyzed and compared with spectroscopic data from spontaneous Raman scattering. A new crystalline Raman laser based on PbWO(4) was developed for the chi((3)) conversion frequency of 1-microm pump radiation to the first Stokes emission with efficiency up to 40%. We classify all the tungstates as promising media for lasers and neodymium-doped crystals for self-stimulated Raman scattering lasers.
authors.affiliation: Institute of Crystallography, Russian Academy of Sciences, 117333 Moscow, Russia. kaminalex@mtu-net.ru
authors.forename: A A
authors.initials: AA
authors.lastname: Kaminskii
authors.forename: H J
authors.initials: HJ
authors.lastname: Eichler
authors.forename: K
authors.initials: K
authors.lastname: Ueda
authors.forename: N V
authors.initials: NV
authors.lastname: Klassen
authors.forename: B S
authors.initials: BS
authors.lastname: Redkin
authors.forename: L E
authors.initials: LE
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Findeisen
authors.forename: D
authors.initials: D
authors.lastname: Jaque
authors.forename: J
authors.initials: J
authors.lastname: García-Sole
authors.forename: J
authors.initials: J
authors.lastname: Fernández
authors.forename: R
authors.initials: R
authors.lastname: Balda