title: [Mid-infrared emission properties of Ho3+/Tm(3+)-codoped Ge-Ga-S-CsI glasses].
abstract: A serial of chalcogenide glasses based on 78GeS2-12Ga2S3-10CsI (in molar%) system doped with the different radios of Ho3+/Tm3+ ions were synthesized by melt-quenching method. Their absorption spectra and mid-infrared fluorescence under 808 nm laser excitation were measured. According to Judd-Ofelt theory, the intensity parameters omega(i) (i = 2, 4, 6), spontaneous transition probabilities A(rad) and radiative lifetomes tau(r) for Ho3+ ion were calculated. Absorption cross-sections sigma(a), emission cross-sections sigma(e) and gain coefficient G(lambda) corresponding to the emission of Ho3+ ions at 2.0 microm were obtained. By changing the Tm3+ concentration, the energy transfer regime of Tm3+ and Ho3+ ions under 808 nm excitation was investigated. The results show that Ho3+/Tm(3+)-codoped Ge-Ga-S-CsI glasses would be a potential material for 2.0 microm emission.
authors.affiliation: College of Information Science and Engineering, Ningbo University, Ningbo 315211, China. zhujun@nbu.edu.cn
authors.forename: Jun
authors.initials: J
authors.lastname: Zhu
authors.forename: Shi-Xun
authors.initials: SX
authors.lastname: Dai
authors.forename: Li-Gang
authors.initials: LG
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
authors.forename: Xun-Si
authors.initials: XS
authors.lastname: Wang
authors.forename: Tie-Feng
authors.initials: TF
authors.lastname: Xu
authors.forename: Qiu-Hua
authors.initials: QH
authors.lastname: Nie