Growth and spectroscopic characterizations: properties of Nd:LiLa(MoO4)(2) single crystal fibers

Autor(es)

de Moraes, Jair Ricardo ^[1] ; da Silva, Fernando Rodrigues ^[1] ; Gomes, Laercio ^[1] ; Mazzocchi, Vera Lucia ^[1] ; Ramos Parente, Carlos Benedicto ^[1] ; Baldochi, Sonia Licia ^[1]

Afiliação do(s) autor(es)

^[1] CNEN SP, IPEN, BR-05422970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CrystEngComm; v. 15, n. 12, p. 2260-2268, 2013.
• Citações Web of Science: 8

Resumo

In this work single crystal fiber growth by the micro-pulling-down technique and the structural and spectroscopic characterizations of undoped and Nd3+-doped double molybdate LiLa(MoO4)(2) are reported. The optimization of the growth conditions was studied in order to avoid facet formation. The grown fibers are free of scattering centers and the real dopant concentrations were confirmed to be very close to the nominal ones with a quite uniform distribution along the fibers length. The crystallographic structure concerning the scheelite tetragonal symmetries was re-evaluated. Time-resolved fluorescence spectroscopy was applied to the evaluation of some optical properties. Selective laser excitation of the F-4(3/2) at 875 nm and F-4(5/2) at 805 nm has established that the energy levels above the F-4(3/2) level are entirely quenched by multiphonon emission in Nd:LiLa(MoO4)(2) crystal fiber. The potential laser gain of the system was determined using a numerical solution of the rate equations system for the 805 nm continuous pumping regime, which shows the maximum gain of the laser emission at 1.064 mu m for using a Nd3+-doping of 5 mol%. (AU)

• Processo FAPESP: 08/10721-9 - Estudo da preparação de microcristais de LiLa(WO4)2:TR3+ para aplicações fotônicas
• Beneficiário: Jair Ricardo de Moraes
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 00/10986-0 - Estudo de geração de radiação ultravioleta pela excitação multifotônica de íons de Nd(3+) e Er(3+) em cristais fluoretos
• Beneficiário: Laercio Gomes
• Modalidade de apoio: Auxílio à Pesquisa - Regular