Abstract

The photoelastic constant (PEC) is evaluated for 15 zinc tin phosphate glasses in a series of $x\mathrm{ZnO}\text{-}(67-x)\mathrm{SnO}\text{-}33{\mathrm{P}}_2{\mathrm{O}}_5$ where $x$ is 0–30 mol. % at 0.5–7 mol. % intervals. The phase retardation of polarized light, passing through a disk sample with applying various uniaxial loads, was measured for PEC determinations by using a frequency stabilized transverse Zeeman He–Ne laser as a polarized light source. The substitution of ZnO for SnO results in the increase of PEC from negative to positive values in the range of $-1.43$ and $+1.45\times {10}^{-12}{\mathrm{Pa}}^{-1}$. The minimum PEC value of $0.04\pm 0.02\times {10}^{-12}{\mathrm{Pa}}^{-1}$ was experimentally obtained in the 18.5 mol. % ZnO–48.5 mol. % SnO–33 mol. % ${\mathrm{P}}_2{\mathrm{O}}_5$ glass.

© 2012 Optical Society of America

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