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Special optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)(2)Ti2O7 for fiber-lasers
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SYSNO ASEP 0457491 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Special optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)(2)Ti2O7 for fiber-lasers Author(s) Mrázek, Jan (URE-Y) RID, ORCID
Kašík, Ivan (URE-Y) RID
Boháček, Jan (URE-Y)
Proboštová, Jana (URE-Y)
Aubrecht, Ivo (URE-Y)
Podrazký, Ondřej (URE-Y) RID
Cajzl, Jakub (URE-Y)
Honzátko, Pavel (URE-Y) RIDNumber of authors 8 Source Title MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES IV, 9507. - Bellingham : SPIE, 2015 / Kalli Kyriacos ; Kaňka Jiří ; Mendez Alexis - ISSN 0277-786X - ISBN 978-1-62841-628-2 Pages s. 9507031-9507038 Number of pages 8 s. Publication form Print - P Action Conference on Micro-Structured and Specialty Optical Fibres IV Event date 15.04.2015 - 16.04.2015 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords Luminescence ; Nanocrystals ; Fiber-laser Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering Institutional support URE-Y - RVO:67985882 UT WOS 000356703700002 EID SCOPUS 84943369218 DOI 10.1117/12.2179351 Annotation 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) Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2016
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