title: Spectroscopic properties and thermal stability of Er3+ -doped TeO2-B2O3-Nb2O5-ZnO glass for potential WDM amplifier.
abstract: A series of novel 70TeO2-(15-x)B2O3-xNb2O5-15ZnO-1wt.% Er2O3 (TBN x=0, 3, 6, 9, 12 and 15 mol%) tellurite glasses were prepared. The thermal stability, absorption spectra, emission spectra, and the lifetime of the (4)I(13/2) level of Er(3+) ions were measured and investigated. Three Judd-Ofelt intensity parameters Omega(t) (t=2, 4 and 6) (Omega(2)=(5.42-6.76)x10(-20)cm(2); Omega(4)=(1.37-1.73)x10(-20)cm(2); Omega(6)=(0.70-0.94)x10(-20)cm(2)) of Er(3+) ions were calculated by Judd-Ofelt theory. It is found that the Omega(6) first increases with the increase of Nb2O5 content from 0 to 6 mol% and then decreases, which is mainly affected by the number of non-bridging oxygen ions of the glass network. The high peak of stimulated emission cross-section (sigma(e)(peak)=(0.77-0.91)x10(-20)cm(2)) of Er(3+): (4)I(13/2)-->(4)I(15/2) transition were obtained according to McCumber theory and broad full width at half maximum (FWHM=65-73 nm) of the (4)I(13/2)-->(4)I(15/2) transition of Er(3+) ions were measured. The results indicate that these new TBN glasses can be used as a candidate host material for potential broadband optical amplifiers.
authors.affiliation: Faculty of Information Science and Engineering, The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo University, Zhejiang 315211, PR China.
authors.forename: Tiefeng
authors.initials: T
authors.lastname: Xu
authors.forename: Xudong
authors.initials: X
authors.lastname: Zhang
authors.forename: Guangpo
authors.initials: G
authors.lastname: Li
authors.forename: Shixun
authors.initials: S
authors.lastname: Dai
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Nie
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
authors.forename: Xianghua
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000042:Absorption; D000669:Amplifiers, Electronic; D002516:Ceramics / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006358:Hot Temperature; D013057:Spectrum Analysis
chemical_list: C522625:TeO2-B2O3-Nb2O5-ZnO glass; D005063:Europium