Promising emission behavior in Pr 3+ /In selenide-chalcogenide-glass small-core step index fiber (SIF)

Sakr, Hesham; Tang, Zhuoqi; Furniss, David; Sojka, Lukasz; Sujecki, Slawomir; Benson, Trevor M.; Seddon, Angela B.

Abstract

Selenide-chalcogenide glass, small-core, step-index fiber (SIF), core-doped with Pr3+: 9.51 × 1024 ions m−3 (500 ppmw) is fabricated for the first time with indium to help solubilize Pr3+. Core diameters of 20 or 40 μm are confirmed using scanning electron microscopy and near-field imaging; fibre numerical aperture is ∼0.4. Optical loss is ≥ 4.9 dB m−1 across the 3–9 μm mid-infrared (MIR) spectral range. On pumping at 1.55 μm or 2.013 μm, the SIFs give broad MIR emission across 3.5–6 μm assigned to 3H6 → 3H5 and 3H5 → 3H4. The Pr3+ emission-lifetime at 4.7 μm decreases from bulk-glass (10.1 ± 0.3 ms), to intermediately processed fiber (8.10 ± 0.5 ms) to SIF (7.1 ± 0.5 ms) induced by the processing. On end-pumping SIFs at 2.013 μm, the output pump-power and emission intensity at 4.7 μm became sub-linear and super-linear, respectively, suggesting MIR excited-state saturation is occurring.

Citation

Sakr, H., Tang, Z., Furniss, D., Sojka, L., Sujecki, S., Benson, T. M., & Seddon, A. B. (2017). Promising emission behavior in Pr 3+ /In selenide-chalcogenide-glass small-core step index fiber (SIF). Optical Materials, 67, 98-107. https://doi.org/10.1016/j.optmat.2017.03.034

• Journal Article Type: Article
• Acceptance Date: Mar 22, 2017
• Online Publication Date: Apr 1, 2017
• Publication Date: 2017-05
• Deposit Date: May 9, 2017
• Publicly Available Date: May 9, 2017
• Journal: Optical Materials
• Print ISSN: 0925-3467
• Electronic ISSN: 1873-1252
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 67
• Pages: 98-107
• DOI: https://doi.org/10.1016/j.optmat.2017.03.034
• Keywords: Mid-infrared; Chalcogenide glass; Rare earth ions; Emission; Emission-lifetime; Excited-state saturation
• Public URL: https://nottingham-repository.worktribe.com/output/969644
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0925346717301763
• Contract Date: May 9, 2017