基于光电振荡器和高双折射光纤的应变测量  

Strain measurement based on optoelectronic oscillator and high-birefringence fiber

作　　者：邴帆 孙春然 王目光[1,2] 张静 唐宇[1,2] BING Fan;SUN Chunran;WANG Muguang;ZHANG Jing;TANG Yu(Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China;Key Laboratory ofAll Optical Network and Advanced Telecommunication Network,Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;China North Industries Corp.,Beijing 100053,China)

机构地区：[1]北京交通大学光波技术研究所,北京100044 [2]北京交通大学全光网络与现代通信网教育部重点实验室,北京100044 [3]中国北方工业有限公司,北京100053

出　　处：《光通信技术》2022年第3期43-46,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(U2006217、61775015)资助。

摘　　要：为了改善在复杂电磁环境下应变测量的性能,提出了一种基于光电振荡器(OEO)和高双折射(Hi-Bi)光纤的新型应变测量方案。应变会引起Hi-Bi光纤中快慢轴上传输的2个正交偏振光之间的相位差改变,通过合理控制输入到马赫-曾德尔调制器的光信号的偏振态,将该相位差变化映射至OEO振荡微波信号的频率变化,进而通过监测频率变化实现应变的解调。理论分析和实验结果表明,OEO产生的振荡微波信号频率与应变呈线性关系,所提应变测量方案的灵敏度为-369.3 Hz/με。In order to improve the performance of strain measurement in complex electromagnetic environment,a novel strain measurement method is proposed based on optoelectronic oscillator(OEO)and high-birefringence(Hi-Bi)fiber.The strain will cause the change of phase difference between the two orthogonal polarized lights transmitted on the fast and slow axes of the Hi-Bi fiber,By properly controlling the polarization state of the light wave sent into the Mach-Zehnder modulator,the phase change is mapped to the frequency change of the OEO oscillating microwave signal.Therefore,the demodulation of strain is achieved by monitoring the frequency change.Theoretical analysis and experiment results show that the frequency of the oscillating microwave signal generated by OEO has a linear relationship with strain,and sensitivity of the proposed measurement method is-369.3 Hz/με.

关 键 词：光电振荡器 高双折射光纤 应变测量 光纤传感 灵敏度 

分 类 号：TN256[电子电信—物理电子学]