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Title

Laser spectroscopy of Nd3+ ions in GeO2-PbO-Bi2O3 glasses

AuthorsBalda, Rolindes ; Fernández, Joaquín ; Sanz, M. ; Pablos, Ángel de ; Fernández Navarro, José María ; Mugnier, J.
KeywordsLead-germanate glasses
Metal oxide glasses
Rare-earth ions
Up-conversion
Energy-transfer
Optical-properties
Fluorescence
Absorption
Dependence
Emission
Issue Date1-Feb-2000
PublisherAmerican Physical Society
CitationPhysical Review - Section B - Condensed Matter 61(5): 3384-3390 (2000)
AbstractThe optical properties of Nd3+ ions in six different compositions of glasses based on GeO2, PbO, and Bi2O3 have been investigated by using steady-state and time-resolved laser spectroscopy. Judd-Ofelt parameters were derived from the absorption spectra and used to calculate the 4F3/2→4H11/2 stimulated emission cross section and the 4F3/2 radiative lifetime. Site-selective spectroscopy and time resolved fluorescence line narrowing experiments were performed in the 4F3/2→4I9/2,4I 11/2 transitions. For all samples studied a line narrowing of the 4F3/2→4I11/2 emission has been observed when exciting at the long wave side of the 4I9/2→4F3/2 transition. The lifetimes of the 4F3/2 state do not show a monotonic variation with the excitation wavelength indicating large site-to-site variations in the local crystal field. Spectral migration of excitation among the Nd3+ ions has been studied from the time evolution of the 4F3/2→4I9/2 spectra under resonant excitation. The results can be interpreted in terms of a dipole-dipole energy transfer mechanism. Visible upconversion has been observed in these glasses under infrared laser excitation. ©2000 The American Physical Society.
Publisher version (URL)http://doi.org/10.1103/PhysRevB.61.3384
URIhttp://hdl.handle.net/10261/100746
DOI10.1103/PhysRevB.61.3384
Identifiersissn: 0163-1829
e-issn: 1095-3795
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