Faraday Angle and Accuracy Measurement of Magneto-Optic Current Transmission Based on New Telluride Glass

Abstract

Two robust temperature-insensitive magneto-optical current sensor prototypes, based on double polarimetric processing schemes and single light way methods, were constructed using light reflection and light transition, respectively. A diamagnetism TeO2-PbO-ZnO-BaF2 bulk glass was fabricated as a sensing head which, with/without a silver layer, acts as a mirror sputtered by RF sputtering. The Verdet constant of the TPZBF glass was measured using the self-made optical bench. The current sensors were evaluated under various currents and different temperatures. Results indicated that the constructed low-cost current sensor prototypes are accurate and stable for current sensing applications.

Keywords

• Faraday effect
• current sensor
• tellurite glass