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Graphical abstract Near/Mid-IR emission spectra of SGC-1, SGC-3, SGC-0Mn and SGC-10.0Mn glass ceramics samples under 980 nm excitation. Highlights • Near/mid-infrared emission of Er-doped via Mn2+–Yb3+ dimer were investigated. • NIR emission of Er-doped band centered at ∼1.54 µm was increased about four-fold. • MIR emission of Er-doped band centered at ∼2.73 µm was increased about third-fold. Abstract The near/mid-infrared emission of Er3+-doped, Er3+-Yb3+ co-doped and Er3+-Mn2+-Yb3+ tri-doped in 40SiO 2 –(22.9-x)Al 2 O 3 –20BaF 2 –10LaF 3 –5TiO 2 – xMnO–0.1Er 2 O 3 –2Yb 2 O 3 (in mol.%, x = 0, 2.0, 4.0, 6.0 and 10.0) (acronym: SGC-xMn) transparent silicate glass-ceramics were prepared. Enhanced near/mid-infrared emission intensity of Er3+-doped bands centered at ∼1.54 and ∼2.73 µm in transparent silicate glass-ceramics via Mn2+–Yb3+ dimer under 980 nm excitation were investigated. XRD results indicate that the Mn2+ ions are dispersed into the glass matrix. With the forming of Mn2+–Yb3+ dimer and the energy transfer processes from Mn2+–Yb3+ dimer and Mn2+ to Er3+ ions has led to NIR emission intensity of Er3+-doped at ∼1.54 µm was increased significantly about four-fold and the MIR emission intensity of Er3+-doped at ∼2.73 µm was increased about third-fold. In addition, based on the decay time spectra, mechanism of energy transfer processes between Mn2+–Yb3+ dimer, Mn2+ and Er3+ ions were also discussed. [ABSTRACT FROM AUTHOR]

Graphical abstract Broadband NIR emission spectra of SG-0Er0Nd2Bi, SG-0.4Er0Nd0Bi, SG-0Er0.5Nd0Bi and SG-0.4Er0.5Nd2Bi transparent glass-ceramics samples. Highlights • Broadband NIR emission of Nd–Bi–Er co-doped transparent glass-ceramics was investigated. • A NIR broadband with an FWHM of 600 nm which covered the whole O, E, S, C and L bands was observed. • Mechanism of energy transfer between Bi-related and Er3+, Nd3+ was proposed. • The studied material could provide potential EDFA application in a WDM system. Abstract Super broadband NIR (near-infrared) emission and energy transfer of Nd–Bi–Er co-doped transparent silicate glass-ceramics under excitation 808 nm laser diode were investigated. Super broadband NIR emission in Nd–Bi–Er co-doped extending from 1000 to 1600 nm with a full-width at half-maximum (FWHM) of 600 nm were observed. This result is due to the overlapping NIR emission band centered at 1275 nm (ES 1 → GS) of Bi-related and NIR emission band centered at 1063 nm (4F 3/2 → 4I 11/2) of Nd3+ as well as NIR emission spectral band centered at 1546 nm (4I 13/2 → 4I 15/2) of Er3+. At the same time, the energy transfer processes between Bi-related, Nd3+ and Er3+ were also discussed and proposed. [ABSTRACT FROM AUTHOR]