Upconversion Luminescence in Yb3+/Tm3+ Doped Double Clad Optical Fibre

J. Zmojda, D. Dorosz, M. Kochanowicz and J. Dorosz Department of Optoelectronics and Lighting Technology, Białystok University of Technology, Wiejska 45, 15-351 Białystok, Poland

Full Text PDF

The paper presents luminescence properties of telluride glass doped with Yb3+/Tm3+ ions. Strong blue emission at 477 nm corresponding to the transition 1G4 → 3H6 in thulium ions was measured under the excitation of a 976 nm diode laser. The dependence of the upconversion: emission upon the thulium ions concentration was studied in order to determine the optimal ion content. The results showed that intensity of upconversion emission enhances, with the increase of Tm3+ content up to 0.1 mol.%. The most effective energy transfer Yb3+ → Tm3+ occurs in the glassy matrix with molar ratio of dopant 1 Yb3+ : 0.1 Tm3+. Double-clad optical fibre was made of glass with the highest upconversion intensity at the wavelength of λ = 477 nm (TGPF101). As a result of optical excitation (λ = 976 nm) of the produced optical fibre, an additional emission line, which was not noticed in the glass, was observed at the wavelength of 351 nm corresponding to the 1D2 → 3H6 transition.

DOI: 10.12693/APhysPolA.120.776 PACS numbers: 42.81.-i, 42.79.Ag, 33.20.Kf, 42.25.Bs