Abstract

The photoelastic constant (PEC) is evaluated for 15 zinc tin phosphate glasses in a series of xZnO-(67x)SnO-33P2O5 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 +1.45×1012Pa1. The minimum PEC value of 0.04±0.02×1012Pa1 was experimentally obtained in the 18.5 mol. % ZnO–48.5 mol. % SnO–33 mol. % P2O5 glass.

© 2012 Optical Society of America

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