White emission of Yb²⁺:fluoride glasses efficiently excited with near-UV light

Various Yb²⁺-containing fluoride glasses melting under a reductive atmosphere were prepared. The brightest white light emission was observed for an AlF₃-based fluoride glass not containing Hf or Zr. The largest full width at half maximum of the white emission spectra was 202 nm. In addition, incorpo...

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Published inOptics express Vol. 21; no. 19; pp. 22043 - 22052
Main Authors Okamoto, Hideyuki, Kasuga, Ken, Kubota, Yoshinori, Nishimura, Natsuya, Kawamoto, Hiromi, Miyauchi, Koichi, Shimotsuma, Yasuhiko, Miura, Kiyotaka
Format Journal Article
LanguageEnglish
Published United States 23.09.2013
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Summary:Various Yb²⁺-containing fluoride glasses melting under a reductive atmosphere were prepared. The brightest white light emission was observed for an AlF₃-based fluoride glass not containing Hf or Zr. The largest full width at half maximum of the white emission spectra was 202 nm. In addition, incorporation of chloride into the AlF₃-based glass enabled efficient excitation with near-ultraviolet light corresponding to a GaN bandgap of 3.4 eV and the maximum internal quantum efficiency of Yb²⁺: AlF₃-based fluoride glass was 42%.
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ISSN:1094-4087
DOI:10.1364/OE.21.022043