Fluorescence and Nonradiative Properties of Nd 3+ in Novel Heavy Metal Contained Fluorophosphate Glass

• Published in: Advances in OptoElectronics (Hindawi) 2007-04, Vol.2007, p.1-8
• Main Authors: Choi, Ju H., Margaryan, Alfred, Margaryan, Ashot, Shi, Frank G., Der Veer, Wytze Van
• Format: Article
• Language: English
• ISSN: 1687-563X; 1687-5648
• DOI: 10.1155/2007/39892

We demonstrate new series of heavy metal containing fluorophosphate glass system. The fluorescence and nonradiative properties of Nd 3 + ions are investigated as a function of Nd 2 O 3 concentration. The variation of intensity parameters Ω 2 , Ω 4 , and Ω 6 is determined from absorption spectra. The spontaneous probability ( A ) and branching ratio ( β ) are determined using intensity parameters. The emission cross sections for the 4 F 3 / 2 → 4 I 13 / 2 transition, which is calculated by Fuchtbabauer-Ladenburg method, decrease from 6.1 × 10 − 21 to 3.0 × 10 − 21 ( pm 2 ) and those for the 4 F 3 / 2 → 4 I 11 / 2 transition decrease from 3.51 × 10 − 20 to 1.7 × 10 − 20 as Nd 2 O 3 concentration increase up to 3 wt % . The nonradiative relaxation is analyzed in terms of multiphonon relaxation and concentration quenching due to energy transfer among Nd 3 + ions. Finally, the above results obtained at 1 wt % Nd 2 O 3 are compared with some of reported laser host glasses which indicated the potentials for broadband-amplifiers and high-power laser applications.