Marcin Pietrzycki,1 Marcin Kochanowicz,1 Patryk Romańczuk,1 Jacek Żmojda,1 Piotr Miluski,1 Tomasz Ragiń,1 Piotr Jeleń,2 Maciej Sitarz,2 Dominik Dorosz1
1Bialystok Univ. of Technology (Poland) 2AGH Univ. of Science and Technology (Poland)
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The 2 μm and visible emission of low phonon (805 cm-1) germanate glasses and double – clad optical fiber co-doped with 0.7Yb2O3/(0.07-0.7)Ho2O3 ions have been investigated. Luminescence at 2 μm corresponding to Ho3+: 5I7 → 5I8 as well as upconversion luminescence in the visible spectral range corresponding to the Ho3+: 5S2(5F4)→5I8 (545 nm), and Ho3+: 5F5→5I8 (655 nm) transition, respectively were obtained. The optimization of the acceptor content and donor-acceptor ratio were conducted with the purpose of maximizing the luminescence intensity. The highest luminescence intensity in both spectral range was obtained in glass co-doped with 0.7Yb2O3/0.15 Ho2O3. Despite relatively small effective absorption coefficient of the optical fiber comparative analysis of luminescent properties of fabricated glasses (further core) and double – clad optical fiber showed significant contribution of reabsorption process of emitted ASE signal.
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Marcin Pietrzycki, Marcin Kochanowicz, Patryk Romańczuk, Jacek Żmojda, Piotr Miluski, Tomasz Ragiń, Piotr Jeleń, Maciej Sitarz, Dominik Dorosz, "Comparative analysis of luminescent properties of germanate glass and double-clad optical fibers co-doped with Yb3+/Ho3+ ions," Proc. SPIE 10031, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016, 1003109 (28 September 2016); https://doi.org/10.1117/12.2248898