title: Thermo-optical characteristics and concentration quenching effects in Nd3+ doped yttrium calcium borate glasses.
abstract: In this work we present a comprehensive study of the spectroscopic and thermo-optical properties of a set of samples with composition xNd(2)O(3)-(5-x)Y(2)O(3-)40CaO-55B(2)O(3) (0 ≤ x ≤ 1.0 mol%). Their fluorescence quantum efficiency (η) values were determined using the thermal lens technique and the dependence on the ionic concentration was analyzed in terms of energy transfer processes, based on the Förster-Dexter model of multipolar ion-ion interactions. A maximum η = 0.54 was found to be substantially higher than for yttrium aluminoborate crystals and glasses with comparable Nd(3+) content. As for the thermo-optical properties of yttrium calcium borate, they are comparable to other well-known laser glasses. The obtained energy transfer microparameters and the weak dependence of η on the Nd(3+) concentration with a high optimum Nd(3+) concentration put this system as a strong candidate for photonics applications.
authors: Grupo de Fotônica e Fluidos Complexos, Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió-Al, Brazil.
authors: D R S
authors: DR
authors: Santos
authors: C N
authors: CN
authors: Santos
authors: A S S
authors: AS
authors: de Camargo
authors: W F
authors: WF
authors: Silva
authors: W Q
authors: WQ
authors: Santos
authors: M V D
authors: MV
authors: Vermelho
authors: N G C
authors: NG
authors: Astrath
authors: L C
authors: LC
authors: Malacarne
authors: M S
authors: MS
authors: Li
authors: A C
authors: AC
authors: Hernandes
authors: A
authors: A
authors: Ibanez
authors: C
authors: C
authors: Jacinto