Tm3+/Ho3+-Doped ASE Fibre Source for Mid-Infrared Sensor Applications |
| D. Dorosz, J. Żmojda, M. Kochanowicz, P. Miluski and J. Dorosz
Department of Optoelectronics and Lighting Technology, Białystok University of Technology, Wiejska 45, 15-351 Białystok, Poland |
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| The infrared emission of Tm3+/Ho3+-doped antimony-silicate optical fiber has been presented. Luminescence at 2.1 μm corresponding to 5I7 → 5I8 transition in holmium was obtained by energy transfer between Tm3+ and Ho3+ ions. According to the Förster-Dexter theory, the efficiency of energy transfer of the 3F4 (Tm3+) → 5I7 (Ho3+) transition was calculated. The optimization of the activator content and the donor (Tm3+)/-acceptor (Ho3+) ions concentration ratio were conducted with the purpose of maximizing the efficiency of energy transfer. It made possible to select best-suited glass which was used to manufacture double-clad optical fiber. Strong and narrow bands of amplified spontaneous emission which formed as a result of energy transfer between thulium and holmium ions were observed in the fiber under exciting with radiation at 795 nm wavelength. |
| DOI: 10.12693/APhysPolA.122.927 PACS numbers: 42.81.-i, 42.79.Ag, 33.20.Kf |