Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 44, Issue 2, Pages 1123-1130Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2023.09.027
Keywords
Heavy metal oxide glasses; Nanocrystal glasses; Rare-earth-doped; Broadband amplification
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This paper reports on the broadband near-infrared emission in Er3+-doped nanocrystal-modified glasses, where the emission spectrum is broadened and enhanced through the presence of nanocrystals, covering a wide wavelength range within the optical communications windows.
This paper reports a broadband near-infrared emission ranging from 1400 to 1660 nm in Er3+-doped nanocrystal-modified PbO-PbF2-Bi2O3-Ga2O3 glasses. After heat treatment, X-ray diffraction measurements were performed and confirmed that PbBiO2F nanocrystals were precipitated in the precursor glasses. As nanocrystals alter the local environment around Er3+ ions, the emission spectrum of the transition I-4(13/2)-> I-4(15/2) is broadened and enhanced, resulting in a broadband emission and an FWHM wavelength range of 143.4 nm from 1470.1 to 1613.5 nm, which overlaps the S+C+L optical communications windows. In addition, the emission intensity of the I-4(11/2)-> I-4(13/2) transition is also found to be increased after heat treatment, thus enhancing the lambda similar to 2750 nm emission intensity. Our results indicate that an Er3+-doped nanocrystal-modified PbO-PbF2-Bi2O3-Ga2O3 glass could be a competitive candidate material that can offer improved bandwidths for S+C+L broadband amplifiers used in very high-capacity optical communications systems
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