Enhanced mid-infrared emission of non-oxide erbium doped fluorochloride glass
OPTOELECTRONICS LETTERS(2020)
摘要
The fluorochloride glasses samples with good luminescent properties in the infrared region were successfully prepared by melt quenching method. The introduction of Cl − effectively improved the mid-infrared (MIR) luminescence of erbium-doped fluoride glass at 2.7 µm nearby. According to Judd-Ofelt theory, the increase in Ω 2 after the introduction of Cl − indicates an increase in the asymmetry and covalence of the sample. X-ray diffraction (XRD), absorption spectrum, Raman spectroscopy, infrared Fourier (FTIR) and infrared fluorescence spectroscopy were specifically conducted. The emission cross section (1.04×10 −20 cm 2 ) and the absorption cross section (9.68×10 −21 cm 2 ) of the sample at 2.7 µm nearby were calculated by measurement. Therefore, non-oxide erbium-doped fluorochloride glass is a good luminescent material in the MIR band.
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