Compositional dependence of photoelasticity of tin phosphate glasses

Abstract

The photoelastic constants (PECs) of transparent SnO-P₂O₅ (SP) glasses with 52-72 mol% SnO were determined using a frequency stabilized transverse Zeeman He-Ne laser (STZL) at 633 nm. The SP glass samples were melted at 950°C in carbon crucibles and at 1050°C in alumina crucibles. The melting conditions affect the values of glass transition temperature and OH content but have almost no effect on PEC. The PEC varies monotonically with increasing SnO concentration from -0.73 to -1.98 × 10^-12 Pa^-1.