Compositional dependence of birefringence of anisotropic alkali meta-phosphate glass

Abstract

Anisotropic alkali meta-phosphate glass fibers were prepared with a fiber elongating method. Composition dependence of birefringence caused by the anisotropic structure was revealed that the phosphorus chain orientation in the fiber was predominantly affected by the kind of network modifier. LiNaKCsPO3 glass showed the highest birefringence among the alkali meta-phosphate glasses investigated in this study. The composition dependence of birefringence and mixed alkali effect were discussed in terms of the structural studies of the anisotropic glass fiber performed by the polarized Raman spectroscopy.