Research on the near infrared luminescence properties of Nd3+doped B2O3-BaF2-GeO2/Bi2O3 glass

Nd3+ borate glass with different concentrations of GeO2 or Bi2O3 was prepared by high temperature melting. XRD, XPS, density and FT-IR were used to analyze the effect of different heavy metal doping concentrations on the glass structure and network. The luminescence characteristics of two groups of glass samples were measured and characterized by absorption spectrum, emission spectrum and fluorescence lifetime. The results show that doping GeO2 or Bi2O3 can effectively improve the near infrared luminescence intensity of borate glass at 1064 nm. It is proved that heavy metal doping enhances the near infrared luminescence intensity of borate glass, which expands the research field depth of B-Ba-Bi-Nd glass. Combined with emission spectrum, band gap and J-O parameter calculation, the improvement effect of heavy metal doping on the structure of borate glass matrix was explained in detail. The fluorescence attenuation curve shows that both groups of glass samples have long life output, which accords with the luminescence characteristics of Nd3+ ions. Further expand and enhance its application value in solid state laser and optical fiber.