Visible to near-infrared broadband fluorescence from Ce-doped silica fiber
Yadav, Amit; Chichkov, Nikolai B.; Gumenyuk, Regina; Ali-Löytty, Harri; Lahtonen, Kimmo; Valden, Mika; Melkumov, Mikhail A.; Yashkov, Mikhail V.; Zherebtsov, Evgeny; Rafailov, Edik U. (2021-07-14)
Amit Yadav, Nikolai B. Chichkov, Regina Gumenyuk, Harri Ali-Löytty, Kimmo Lahtonen, Mika Valden, Mikhail A. Melkumov, Mikhail V. Yashkov, Evgeny Zherebtsov, and Edik U. Rafailov, "Visible to near-infrared broadband fluorescence from Ce-doped silica fiber," Opt. Mater. Express 11, 2528-2538 (2021)
Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2021102151955
Tiivistelmä
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.
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