Er3+-doped PbO:B2O3, PbO:Ga2O3:B2O3, PbO:Bi2O3:B2O3 and PbO:Ga2O3:Bi2O3:B2O3 showing broadband 1.5 μm absorption and emission are reported and their emission spectra, radiative, non-radiative transition probabilities, fluorescence lifetime, and their quantum efficiency were studied. It was found that glasses with high refractive index (1.78–1.94) had high spontaneous transition probability Aj′j (172.93–245.98 s−1). FT-IR spectra for such glasses were carried out in order to investigate their vibration frequency and phonon energy. The phonon energy for such glasses (1375–1200 cm−1) decreased with increasing PbO content. The multiphonon relaxation for all glass samples was not a dominating factor for the non-radiative transition process. The high non-radiative transition rates (254.02–613.32 s−1) therefore should be due to energy transfer to the impurities (OH groups) and cross-relaxations in these glasses, which can be minimized.
Novel Er-doped PbO and B2O3 based glasses: investigation of quantum efficiency and non-radiative transition probability for 1.5 μm broadband emission fluorescence / Q. CHEN; M. FERRARIS; Y. MENKE; D. MILANESE; E. MONCHIERO. - In: JOURNAL OF NON-CRYSTALLINE SOLIDS. - ISSN 0022-3093. - 324:1-2(2003), pp. 12-20. [10.1016/S0022-3093(03)00223-0]
|Titolo:||Novel Er-doped PbO and B2O3 based glasses: investigation of quantum efficiency and non-radiative transition probability for 1.5 μm broadband emission fluorescence|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/S0022-3093(03)00223-0|
|Appare nelle tipologie:||1.1 Articolo in rivista|