Thermodynamic Modeling and Analysis of an Optical Electric-Field Sensor

Sensors

Xia Xiao¹  Yan Xu²  Zexing Dong² 

[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

关键词: optical electric-field sensor;    thermodynamic model;    sensor crystal;    optical properties;    stability;   

DOI  :  10.3390/s150407125

来源: mdpi

【 摘 要 】

The stability of the optical electric field sensor (OEFS) in actual operation is affected by environmental factors such as temperature and SF₆ (sulfur hexafluoride). To analyze the operational environment parameters affecting the optical properties of crystals, a thermodynamic model of the OEFS in which the optical properties of the crystal are changed by the first-order effects and the second-order effects was established. The intensity parameters such as electric, stress and temperature fields were introduced. The theoretical analysis results show that under temperature, stress and electric field conditions, the optical properties of the sensing crystals are no longer changed only by the electro-optic effect, but also by the temperature and the stress fields. Further synthesis suggests the expected optical property changes under the effect of the environment fields. OEFS tests show that the accuracy of OEFS is dependent on temperature with a ratio error of −0.8%~1.5% in the temperature range from −25 °C to +40 °C.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.