Broadband mid-infrared emission from Cr2+ in crystal-in-glass composite glasses by Hot Uniaxial Pressing

Abstract : Cr2+-doped II-VI crystals have witnessed an excellent gain media for continuously tunable and femtosecond-pulsed lasers. Despite this, major challenges persist toward realizing ultrabroad emission bandwidth and efficient Cr2+-doped fiber due to the valence diversity of Cr, especially in chalcogenide glasses. Here, we propose to prepare Cr2+ZnSe/As2S3-xSex composite glasses by Hot Uniaxial Pressing (HUP), a method that sinters uniformly mixed crystal and glass powders into geometrically designed composite chalcogenide glasses. The densification of the composite glasses reached 99.88%, indicating that a few or none pores remain. Our research shows that Cr2+ZnSe crystals have good performance in chalcogenide glasses, and the composite glasses have the potential to be made into mid-infrared–doped fibers. It was demonstrated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) that the composite glasses have a uniform Cr2+ZnSe distribution and no crystal disintegration. The transmittance of the composite glasses was significantly improved by tailoring the refraction index. The mid-infrared (MIR) fluorescence and decay of the glasses were measured. The lattice constant was measured, calculated, and discussed to reveal the influence of sintering process on lifetime. © 2019 The American Ceramic Society
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Submitted on : Friday, July 12, 2019 - 2:05:28 PM
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K. Xia, Z. Liu, Y. Yuan, H. Chen, H. Gan, et al.. Broadband mid-infrared emission from Cr2+ in crystal-in-glass composite glasses by Hot Uniaxial Pressing. Journal of the American Ceramic Society, Wiley, 2019, ⟨10.1111/jace.16538⟩. ⟨hal-02181836⟩

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