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The Effect of thermal and mechanical processing on the fluorescence lifetime of Yb-doped silica preforms and fibers for use in nanostructured-core fiber lasers
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SYSNO ASEP 0560102 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title The Effect of thermal and mechanical processing on the fluorescence lifetime of Yb-doped silica preforms and fibers for use in nanostructured-core fiber lasers Author(s) Vařák, Petr (URE-Y)
Kašík, Ivan (URE-Y) RID
Peterka, Pavel (URE-Y) RID
Mrázek, Jan (URE-Y) RID, ORCID
Kamrádek, Michal (URE-Y)
Aubrecht, Jan (URE-Y) RID
Podrazký, Ondřej (URE-Y) RID
Bartoň, Ivo (URE-Y) ORCID, RID
Franczyk, M. (PL)
Buczynski, R. (PL)
Honzátko, Pavel (URE-Y) RIDNumber of authors 11 Article number 1198103 Source Title FIBER LASERS XIX: TECHNOLOGY AND SYSTEMS. - Bellingham : SPIE, 2022 / Jauregui-Misas C. ; Supradeepa V.R. - ISSN 0277-786X - ISBN 978-1-5106-4833-3 Pages roč. 11981 (2022) Series Proceedings of SPIE Number of pages 6 s. Publication form Print - P Action Conference on Fiber Lasers XIX - Technology and Systems at SPIE LASE Conference Event date 22.01.2022 - 24.02.2022 VEvent location San Francisco and Virtual Country US - United States Event type WRD Language eng - English Country US - United States Keywords Optical fiber ; preform ; silica glass ; ytterbium ; fiber lasers ; luminescence ; fluorescence lifetime Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GF21-45431L GA ČR - Czech Science Foundation (CSF) Institutional support URE-Y - RVO:67985882 UT WOS 000831625300002 EID SCOPUS 85131221335 DOI 10.1117/12.2608684 Annotation In this paper, we investigate the influence of various nanostructured-core fiber fabrication processes, such as preform elongation or fiber drawing, on the fluorescence lifetime of Yb3+ ions. The optical fiber preform was prepared using Modified Chemical Vapor Deposition (MCVD) method combined with Al2O3 nanoparticle doping. The optical fiber preform was subjected to various processing treatments involving heat and mechanical stresses, i.e. preform elongation and fiber drawing, and the fluorescence lifetime was measured in all stages of fiber fabrication, i.e. original preform, elongated preform (cane), fiber and overcladded fiber. It was found that the time-resolved photoluminescence properties of Yb3+ ions in silica glass are strongly dependent on the processing of the material. The fluorescence lifetime of the F-2(5/ 2) level of Yb3+ ions decreased with the heat and mechanical treatment, which was explained by the break-up of Al2O3 nanoparticles, diffusion of dopants and changes in the Yb3+ phonon environment as well as clustering of the Yb3+ ions. The fiber drawing exhibited a stronger effect compared to preform elongation which was ascribed to the high rate of cooling and mechanical stresses during the drawing process. In general, the heat and mechanical processing of Yb-doped optical fiber preforms leads to a deterioration of time-resolved photoluminescence properties. 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 2023 Electronic address https://doi.org/10.1117/12.2608684
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