Special optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)(2)Ti2O7 for fiber-lasers

0457491 - ÚFE 2016 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Mrázek, Jan - Kašík, Ivan - Boháček, Jan - Proboštová, Jana - Aubrecht, Ivo - Podrazký, Ondřej - Cajzl, Jakub - Honzátko, Pavel
Special optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)(2)Ti2O7 for fiber-lasers.
MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES IV. Vol. 9507. Bellingham: SPIE, 2015 - (Kalli, K.; Kaňka, J.; Mendez, A.), s. 9507031-9507038. Proceedings of SPIE. ISBN 978-1-62841-628-2. ISSN 0277-786X.
[Conference on Micro-Structured and Specialty Optical Fibres IV. Prague (CZ), 15.04.2015-16.04.2015]
Grant ostatní: GA AV ČR(CZ) M100671202
Institucionální podpora: RVO:67985882
Klíčová slova: Luminescence * Nanocrystals * Fiber-laser
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

The paper deals with the preparation and characterization of the silica optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)(2)Ti2O7 with optimized luminescence properties. The sol-gel approach was employed to prepare colloidal solution of (HoxY1-x)(2)Ti2O7 precursors. The concentration of Ho3+ ions in the compounds was varied up to x=0.4. Prepared sols were calcined at 1000 degrees C forming xerogels which were characterized by X-ray diffraction to confirm their structure. The xerogels were analyzed by the mean of steady-state luminescence technique to optimize the concentration of Ho3+ ions in the compound. The most intensive emission at 2050 nm was observed for the compound (Ho5Y95)(2)Ti2O7. Sol of the corresponding composition was soaked into the porous silica frit deposed inside the silica substrate tube which was collapsed into preform and drawn into optical fiber. Single mode optical fiber with the core diameter 12 mu m and outer diameter 125 mu m was prepared. Numerical aperture of prepared fiber was 0.16. The concentration of Ho3+ ions in the fiber core was 0.03 at. %. Background attenuation of prepared fiber at 850 nm was smaller than 0.5 dB.m(-1)
Trvalý link: http://hdl.handle.net/11104/0257893