title: Investigation of thermal stability and spectroscopic properties in Er3+/Yb3+-codoped TeO2-Li2O-B2O3-GeO2 glasses.
abstract: The new Er3+/Yb3+ co-doped 70TeO2-5Li2O-(25-x)B2O3-xGeO2 (x = 0, 5, 10, 15 fand 20 mol.%) glasses were prepared. The thermal stability, absorption spectra, emission spectra and lifetime of the 4I(13/2) level of Er3+ ions were measured and studied. The FT-IR spectra were carried out in order to investigate the structure of local arrangements in glasses. It is found that the thermal stability, absorption cross-section of Yb3+, emission intensity and lifetime of the 4I(13/2) level of Er3+ increase with increasing GeO2 content in the glass composition, while the fluorescence width at half maximum (FWHM) at 1.5 um of Er3+ is about 70 nm. The obtained data suggest that this system glass can be used as a candidate host material for potential broadband optical amplifiers.
authors.affiliation: College of Information Science and Engineering, Ningbo University, Ningbo 315211, PR China.
authors.forename: Qiu-Hua
authors.initials: QH
authors.lastname: Nie
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Tie-Feng
authors.initials: TF
authors.lastname: Xu
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
mesh_terms: D004871:Erbium / Q000737:chemistry*; D005898:Glass; D006358:Hot Temperature; D008094:Lithium / Q000737:chemistry*; D015233:Models, Statistical; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature; D015018:Ytterbium / Q000737:chemistry*
chemical_list: C016774:tellurium dioxide; D004871:Erbium; D008094:Lithium; D015018:Ytterbium; D013691:Tellurium