[16p-213-1~14] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

[16p-213-2] Low photoelastic property and structure of SnO–SiO₂ glasses

〇Akira Saitoh¹, Keita Suzuki¹, Yuto Hashida¹, Masayuki Itadani¹, Hiromichi Takebe¹ (1.Ehime Univ.)

Keywords:Photoelastic constant

The optical properties of glasses with low photoelastic constant (PEC) are particularly necessary for a fiber type current sensor. One of the critical optical devices using low/zero-PEC glasses is required for an optical-fiber-type current sensor for use in systems that monitor the current in electrical busbars. We will show low/zero PEC composition in tin silicate glass systems with some optical properties designed to the lead free fiber-type current sensors because of problems associated with the toxicity of lead element. The glasses were made by melt quenching method. In the melting environment of low partial O₂ pressure were required for preventing oxidation of divalent tin ions. The glass structure was analyzed by some spectroscopic methods.