A1 Refereed original research article in a scientific journal

First Tellurite Composite Fiber with NIR‐Driven Green Persistent Luminescence




AuthorsSantos Magalhães, Evellyn; Nasser, Khaldoon; Vakkada Ramachandran, Arjun; Närhi, Mikko; Tuomisto, Minnea; Boussard‐Plédel, Catherine; Troles, Johann; Smet, Philippe F.; Lastusaari, Mika; Petit, Laeticia

PublisherWiley

Publication year2025

Journal: Advanced Optical Materials

Article numbere02249

eISSN2195-1071

DOIhttps://doi.org/10.1002/adom.202502249

Publication's open availability at the time of reportingOpen Access

Publication channel's open availability Partially Open Access publication channel

Web address https://doi.org/10.1002/adom.202502249

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/505445447


Abstract

Expanding the excitation range of persistent luminescent (PeL) materials into the near infrared (NIR) region is critical to enable remote, flexible, and compact advanced optical systems. In this study, the fabrication of the first composite fiber based on SrAl2O4:Eu2+, Dy3+ phosphors embedded in Yb3+/Tm3+ co-doped tellurite glass is reported. The fiber is drawn from a translucent, crack-free composite preform prepared with 0.5 wt.% PeL phosphors. Light propagation in the fiber is demonstrated despite the presence of the PeL phosphors. Long-lasting green emission from the preform and fiber is driven by 980 nm and suggests the survival of the PeL phosphors during the preform preparation and fiber drawing processes. The presence of the PeL phosphors in the glass matrix is confirmed using SEM/EDS composition analysis. This work offers a practical and scalable approach for integrating NIR-excitable PeL materials into fiber-based platforms, opening new opportunities for their application in advanced photonic technologies.


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Funding information in the publication
This work was supported by the Research Council of Finland [Flagship Program, Photonics Research and Innovation PREIN-320165] and Business Finland (OFFULA project-2689). MN acknowledges the Weisell Foundation for funding.


Last updated on 2025-19-11 at 13:17