Preparation And Properties Of Dy³⁺/Tb³⁺ Co-Doped Antimony Phosphate Glass

Green lasers are developing rapidly due to their high power and small focused spot,and are widely used in marine exploration,medical and other fields.Dy³⁺/Tb³⁺co-doped laser glass is widely used as a good green light emitting material for laser generation in the green light band,and it can be used as a gain medium in green light lasers.In previous studies of other laser glasses such as Dy³⁺/Tb³⁺co-doped phosphate and tellurite glasses,it is found that the prepared glass samples have lower chemical stability and lower mechanical strength,which hinder their further development.Therefore,higher requirements are put forward to improve the performance of Dy³⁺/Tb³⁺co-doped laser glass.Antimony phosphate glass has great application potential in green light-emitting host glass materials due to its high chemical stability and high solubility of rare earth ions.Based on this research background,Tb³⁺and Dy³⁺mono-doped antimony phosphate glasses are firstly prepared by high temperature melting method.The transmission spectra of Tb³⁺and Dy³⁺mono-doped antimony phosphate glasses are tested,with good transmis-sion rates of over 80%.Then,by analyzing the fluorescence spectra of Dy³⁺mono-doped antimony phosphate glasses,it is found that when Dy³⁺is introduced at a concentration of1 mol%,the emission intensity at 574 nm in the emission spectrum reach a maximum in all Dy³⁺mono-doped antimony phosphate glass samples,so a concentration of 1 mol%of Dy³⁺is selected for co-doping with Tb³⁺.Next,Dy³⁺/Tb³⁺co-doped antimony phosphate glasses are prepared and the thermal stability of the glass samples is found to be better by cal-culatingΔT.The effect of different concentrations of Tb³⁺on the luminescence intensity of Dy³⁺/Tb³⁺co-doped antimony phosphate glass is investigated by fluorescence spectroscopy when Dy³⁺is 1 mol%.It is found that the emission intensity of green light increase with increasing Tb³⁺concentration and the optimum concentration ratio of Dy³⁺to Tb³⁺in the glass sample is determined to be 1:4.At the same time,by analyzing the CIE coordinates of the Dy³⁺/Tb³⁺co-doped antimony phosphate glass,it is determined that the best green light emission can be obtained when the Tb³⁺concentration is 4 mol%.Finally,the energy trans-fer efficiency between Dy³⁺and Tb³⁺is calculated by emission spectrum,and the energy transfer mechanism of Dy³⁺and Tb³⁺is analyzed as electric dipole-dipole.The Dy³⁺/Tb³⁺co-doped antimony phosphate glass prepared in this study is a good material for green light emission and can be used as a gain medium in green lasers.