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浙江大学学报(工学版)
浙江大学学报(工学版)  2021, Vol. 55 Issue (11): 2207-2214    DOI: 10.3785/j.issn.1008-973X.2021.11.022
电气工程     
反射式小型光学电场传感器
林飞宏1(),周吉1,张建培2,杨国华2,杨青1,3,*()
1. 浙江大学 光电科学与工程学院 现代光学仪器国家重点实验室，教育部光子学与技术国际合作联合实验室，浙江 杭州 310027
2. 四川中光防雷技术有限公司，四川 成都 611731
3. 山西大学 极端光学协同创新中心，山西 太原 030006
Reflective miniature optical electric field sensor
Fei-hong LIN1(),Ji ZHOU1,Jian-pei ZHANG2,Guo-hua YANG2,Qing YANG1,3,*()
1. State Key Laboratory of Modern Optical Instrumentation, Joint International Research Laboratory of Photonics, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
2. Sichuan Zhongguang Lightning Protection Technologies Limited Company, Chengdu 611731, China
3. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
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摘要：

为了同时实现对直流电场、交变电场和瞬态电场的测量，通过琼斯矩阵计算，建立基于泡克尔效应的反射式光学电场传感探头的理论传感模型，分析铌酸锂晶体长度、晶体切型、温度以及封装应力对探头传感性能的影响. 制备尺寸Φ5 mm×80 mm，理论电场测量范围为±439.2 kV/m的反射式小型光学电场传感探头，搭建相关的电场传感系统并表征传感探头在10~5000 Hz交变电场、直流场、8.2~12.4 GHz高频微波场下的传感性能. 实验结果表明，该光学电场传感器在直流?12.4 GHz电场频率范围内具有较好的电场响应，在无外加电场时长时间内信号漂移量小于0.08‰，分辨力至少为3 V/m，实际可测量范围为10?3~102 kV/m，有望应用于高功率微波探测和电力系统领域的直流、ms级及ns级暂态电场监测.
关键词： 小型光学电场传感器;  泡克尔效应;  铌酸锂（LN）晶体;  电场测量;  反射式    
Abstract:

The theoretical sensing model of reflective optical electric field sensor based on the Pockels effect was established based on the calculation of Jones matrix, in order to measure the direct current, alternating and transient electric field. The effects of lithium niobate crystal length, crystal cutting type, temperature and external applied stress on the sensing performance of the probe were analyzed. A reflective miniature optical electric field sensor probe, with the size of Φ5 mm×80 mm and the theoretical measurement range of ±439.2 kV/m, was prepared. A sensing system was built to characterize the probe under 10~5000 Hz alternating, direct current and 8.2 GHz to 12.4 GHz high frequency microwave electric field. Results show that the probe performs well in response to electric field in the frequency range of DC-12.4 GHz, with long-time signal drifting no more than 0.08‰, the resolution for at least 3 V/m, and the actual measurement range for 10?3 kV/m to 102 kV/m. This optical electric field sensor can be practical for DC, ms and ns transient electric field monitoring in high-power microwave detection and power systems.
Key words: miniature optical electric field sensor    Pockels effect    lithium niobate (LN) crystal    electric field measurement    reflection-type
收稿日期: 2020-12-23 出版日期: 2021-11-05
CLC:  TN 29  
基金资助: 国家自然科学基金资助项目（61822510，61822510，61735017）；浙江省自然科学基金资助项目（R17F050003）
通讯作者: 杨青     E-mail: linfeihong@zju.edu.cn;qingyang@zju.edu.cn
作者简介: 林飞宏（1996—），女，博士生，从事光学传感技术与微波光子学研究. orcid.org/0000-0003-3551-5568. E-mail： linfeihong@zju.edu.cn
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引用本文:

林飞宏,周吉,张建培,杨国华,杨青. 反射式小型光学电场传感器[J]. 浙江大学学报(工学版), 2021, 55(11): 2207-2214.

Fei-hong LIN,Ji ZHOU,Jian-pei ZHANG,Guo-hua YANG,Qing YANG. Reflective miniature optical electric field sensor. Journal of ZheJiang University (Engineering Science), 2021, 55(11): 2207-2214.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.11.022    或    https://www.zjujournals.com/eng/CN/Y2021/V55/I11/2207

图 1  探头理论传感模型
图 2  Z（X）切型铌酸锂晶体传感性能分析
图 3  交变电场试验装置
图 4  方波信号波形图
图 5  探头在不同频率下的测量幅值-电场强度曲线
图 6  直流电场测试结果
图 7  高频微波场试验装置
图 8  高频微波场试验结果
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