title: Tunable ultraviolet and blue light generation from Nd:YAB random laser bolstered by second-order nonlinear processes.
abstract: Ultraviolet and blue light were obtained by nonlinear frequency conversion in a random laser (RL) based on Nd0.10Y0.90Al3(BO3)4 nanocrystalline powder. RL operation at 1062 nm, due to the (4)F3/2 → (4)I11/2 transition of neodymium ions (Nd(3+)), was achieved by exciting the Nd(3+) with a tunable beam from 680 to 920 nm covering the ground state absorption transitions to the (4)F9/2, ((4)F7/2,(4)S3/2), ((4)F5/2,(2)H9/2), and (4)F3/2 states. Light from 340 to 460 nm was obtained via the second-harmonic generation of the excitation beam while tunable blue light, from 417 to 486 nm, was generated by self-sum-frequency mixing between the excitation beam and the RL emission.
authors.affiliation: Grupo de Física da Matéria Condensada, Núcleo de Ciências Exatas - NCEx, Campus Arapiraca, Universidade Federal de Alagoas, 57309-005, Arapiraca-AL, Brazil.
authors.forename: André L
authors.initials: AL
authors.lastname: Moura
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
authors.forename: Sandra J M
authors.initials: SJ
authors.lastname: Carreño
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
authors.forename: Pablo I R
authors.initials: PI
authors.lastname: Pincheira
authors.affiliation: Grupo Física de Materiais, Instituto de Física, Universidade Federal de Goiás, 74001-970, Goiânia-GO, Brazil.
authors.forename: Zanine V
authors.initials: ZV
authors.lastname: Fabris
authors.affiliation: Grupo Física de Materiais, Instituto de Física, Universidade Federal de Goiás, 74001-970, Goiânia-GO, Brazil.
authors.forename: Lauro J Q
authors.initials: LJ
authors.lastname: Maia
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
authors.forename: Anderson S L
authors.initials: AS
authors.lastname: Gomes
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
authors.forename: Cid B
authors.initials: CB
authors.lastname: de Araújo