@article{4c1430d16a3346cb8cfe7252130a58dc,
title = "Visible to near-infrared broadband fluorescence from Ce-doped silica fiber",
abstract = "We investigate the fluorescence characteristics of a purely Ce-doped silica fiber and demonstrate broad-bandwidth fluorescence across the visible and near-infrared. The Ce-doped fiber is fabricated using standard modified chemical vapor deposition technology. Trace metal analysis by inductively coupled plasma mass spectrometry confirmed the purity of Ce-doping. The Ce valence state of 3+ was revealed by X-ray photoelectron spectroscopy. The optimum pump wavelength for the broadest luminescence from a fiber is scanned between 405 nm to 440 nm wavelength of diode lasers operating under continuous-wave regime. The strongest pump absorption is observed at the wavelength of 405 nm. Variation of pump power and fiber length results in the demonstration of broad-bandwidth fluorescence with spectral widths up to 301 nm (at -10 dB). The measured fluorescence spectra cover the wavelength range from ∼458 nm to ∼819 nm with spectral power densities of up to 2.4 nW/nm.",
author = "Amit Yadav and Chichkov, {Nikolai B.} and Regina Gumenyuk and Harri Ali-L{\"o}ytty and Kimmo Lahtonen and Mika Valden and Melkumov, {Mikhail A.} and Yashkov, {Mikhail V.} and Evgeny Zherebtsov and Rafailov, {Edik U.}",
note = "Funding Information: Funding. Engineering and Physical Sciences Research Council (EP/R024898/1); H2020 Marie Sk{\l}odowska-Curie Actions (843801); Jane & Aatos Erkko Foundation, Business Finland (1464/31/2019); Academy of Finland (326406, 326461); Ministry of Science and Higher Education of the Russian Federation (AAAA-A19-119012590263-7, AAAA-A19-119011-690112-0, theme 0095-2019-006); Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN) (320165). Funding Information: Acknowledgments. The authors thank Dr. Nikita Durandin (Tampere University) for providing of excitation-emission map measurements. This project has received funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska-Curie Actions grant agreement No 843801. This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN) (decision No 320165). This work was supported by Jane & Aatos Erkko Foundation, Business Finland (decision No 1464/31/2019), Academy of Finland (grant Nos. 326461, 326406), and EPSRC (EP/R024898/1). This work was supported in part by the Russian Federation Ministry of Science and Higher Education (Project AAAA-A19-119011-690112-0 and AAAA-A19-119012590263-7, theme 0095-2019-006). Publisher Copyright: {\textcopyright} 2021 OSA - The Optical Society. All rights reserved.",
year = "2021",
doi = "10.1364/OME.432560",
language = "English",
volume = "11",
pages = "2528--2538",
journal = "Optical Materials Express",
issn = "2159-3930",
number = "8",
}