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Nanocrystalline ceramic phosphors for high-power lasers operating at 2μm
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SYSNO ASEP 0519178 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Nanocrystalline ceramic phosphors for high-power lasers operating at 2μm Author(s) Mrázek, Jan (URE-Y) RID, ORCID
Kašík, Ivan (URE-Y) RID
Aubrecht, Jan (URE-Y) RID
Podrazký, Ondřej (URE-Y) RID
Cajzl, Jakub (URE-Y)
Peterka, Pavel (URE-Y) RIDNumber of authors 6 Article number Th.D6.1 Source Title 21st International Conference on Transparent Optical Networks, ICTON 2019. - Varšava : IEEE, 2019 / Jaworski M. ; Marciniak M. - ISSN 2162-7339 - ISBN 978-1-7281-2779-8 Number of pages 4 s. Publication form Print - P Action 21st International Conference on Transparent Optical Networks, ICTON 2019 Event date 09.07.2019 - 13.07.2019 VEvent location Angers Country FR - France Event type WRD Language eng - English Country PL - Poland Keywords Holmium ; Luminescence ; Fiber ; Nanocrystals Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GA17-20049S GA ČR - Czech Science Foundation (CSF) Institutional support URE-Y - RVO:67985882 EID SCOPUS 85073075220 DOI 10.1109/ICTON.2019.8839995 Annotation Rare-earth (RE) doped silica glass optical fibers became a hearth of modern fiber-lasers. Such lasers are fully competitive with conventional solid-state lasers because of their high brightness, high quality beam, high conversion efficiency, good thermal management, tunability, compactness, size and even flexibility. However, a low solubility of RE inside a silica matrix and a high phonon energy of silica glass strongly reduce the luminescence efficiency of incorporated RE elements. Nanoparticle doping represents a powerful method that can eliminate these disadvantages.In this contribution we present an effect of the processing temperature on the luminescence properties of nanocrystalline (Eu0.05Y0.95)2Ti2O7 and (Ho0.05Y0.95)2Ti2O7 phosphors. The luminescence properties of (Ho0.05Y0.95)2Ti2O7 improved with increasing nanocrystal size. The nanocrystals of (Ho0.05Y0.95)2Ti2O7 were successfully incorporated into optical fiber with the outer diameter 125 μm and the core diameter 8 μm. The fiber's numerical aperture was 0.13 and the background losses at 850 nm were 0.38 dB•m-1.The lifetime of the 5I7 →5I8 transition at 1.92 μm was 0.72 ± 0.01 ms. The results bring the fundamental information about the effect of the nanocrystal size their luminescence properties of (RE0.05Y0.95)2Ti2O7 and their possible application as phosphors in active optical fibers 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 2020
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