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光学电压传感器互易性光路研究 被引量:3

Research on reciprocity optical path of optical voltage transformer
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摘要 提高光学电压传感器光路中光波相位差传输稳定性的关键是对系统光路寄生干扰相位差的抑制。为此研究了一种基于晶体材料Pockels效应,并结合sagnac光路结构形成的光学电压传感器,在分析该光路结构互易性机理基础上,提出了将系统光路改为使用熊猫型保偏光纤和低双折射旋转光纤相结合的形式以消除光敏感电路段产生的模式相位差,从而提高了传感器光路互易性。建立了系统光路温度场与热应力数学模型,利用有限元仿真研究了外界环境温度对其相位差传播产生的影响特性,得到外界温度每增加1℃,光路双折射平均减小2.27521×10^(-7)。基于此,对该互易性光路进行了实验研究,实验表明:温度对测量结果最大影响为1.7339%/℃,当环境温度上升10℃时,相比光路全采用熊猫型保偏光纤,传感器测量准确度从6.008%提高至1.53%;当温度上升20℃时,准确度从52.016%提高至8.13%。可初步证明该互易性光路的可行性。 The key of improving the transmission stability of the light wave phase difference in the optical path of the optical voltage sensor is the suppression of the parasitic interference phase difference of the system optical path.To this end,an optical voltage sensor based on the Pockels effect of crystal material and combined with the sagnac optical path structure is studied.Based on the analysis of the reciprocity mechanism of the optical path structure,it is proposed to change the system optical path to use panda-type polarization maintaining fiber and low the combined form of the birefringent rotating fiber can eliminate the mode phase difference generated by the light-sensitive circuit section,thereby improving the optical reciprocity of the sensor.A mathematical model of the temperature field and thermal stress of the optical path of the system is established,and the influence of the external environment temperature on its phase difference propagation is studied by finite element simulation.It is obtained that for every 1℃increase in the external temperature,the optical path birefringence decreases by 2.27521×10-7 on average.Based on this,an experimental study on the reciprocity optical path has been carried out,and experiment shows that the maximum influence of temperature on the measurement result is 1.7339%/℃.When the ambient temperature rises by 10℃,compared to the optical path,all panda-type polarization-maintaining fibers are used for sensor measurement.The accuracy is increased from 6.008%to 1.53%;when the temperature rises by 20℃,the accuracy is increased from 52.016%to 8.13%.The feasibility of the reciprocal optical path can be preliminarily proved.
作者 周扬 王黎明 王腾 曾令强 杨娅姣 Zhou Yang;Wang Liming;Wang Teng;Zeng Lingqiang;Yang Yajiao(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China;China Academy of Aerospace Electronic Technology,Beijing Aerospace Times Optoelectronics Technology Co.,Ltd.,Beijing 100094,China)
出处 《仪器仪表学报》 EI CAS CSCD 北大核心 2021年第7期81-88,共8页 Chinese Journal of Scientific Instrument
基金 国家自然科学基金(41971416,41771487)项目资助。
关键词 光学电压传感器 光路互易性 相位差 有限元仿真 温度特性 optical voltage transformer light path reciprocal phase difference finite element simulation temperature characteristics
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