Optical performance study of Sr2ZnSi2O7:Eu2+,Dy3+, SrAl2O4:Eu2+,Dy3+ and Y2O2S:Eu3+,Mg2+,Ti4+ ternary luminous fiber

(a) Three-dimensional emission spectra of 3:2:5 with different excitations wavelengths from 350 to 450 nm; (b) CIE chromaticity of 2:2:6 and 3:2:5 excited by 350-450 nm