| 柯程虎,金熙,祝战科,柯熙政.光频域反射中非线性补偿技术研究进展[J].电子测量与仪器学报,2026,40(2):1-18 |
| 光频域反射中非线性补偿技术研究进展 |
| Research progress on nonlinear compensation technology foroptical frequency domain reflectometer |
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| DOI： |
| 中文关键词: 光频域反射 非线性补偿 光纤传感 空间分辨率 传感距离 |
| 英文关键词:optical frequency domain reflectometer nonlinear compensation fiber optic sensing spatial resolution sensing distance |
| 基金项目:陕西省重点产业创新项目(2017ZDCXL-GY-06-01)、国家自然科学基金面上项目(61377080)、陕西省自然科学基础研究计划（2024JC-YBMS-562）、陕
西数理基础科学研究项目（23JSQ024）资助 |
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| Author | Institution |
| Ke Chenghu | School of Information Engineering，Xi′an University, Xi′an 710048, China |
| Jin Xi | School of Automation and Information Engineering,
Xi′an University of Technology, Xi′an 710048, China |
| Zhu Zhanke | 3.Shaanxi Polytechnic University, Xianyang 712000,China; 4.Xianyang Key
Laboratory of Intelligent Manufacturing Equipment Technology, Xianyang 712000,Chin |
| Ke Xizheng | 2.School of Automation and Information Engineering,
Xi′an University of Technology, Xi′an 710048, China; 4.Xianyang Key
Laboratory of Intelligent Manufacturing Equipment Technology, Xianyang 712000,China; 5.Shaanxi Civil-Military Integration
Key Laboratory of Intelligence Collaborative Networks, Xi′an 710048, China |
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| 中文摘要: |
| 光频域反射技术(optical frequency domain reflectometry,OFDR)通过将光频扫描非线性转化为可补偿的相位误差，结合频域信号处理，实现厘米级空间分辨率与长距离测量的统一，已成为光纤诊断与精密测量的核心技术之一。但可调谐激光扫频的非线性及相位噪声会影响系统的等频率采样，引起反射展宽和距离偏差，因此，非线性补偿成为提升系统性能的关键。非线性补偿的研究主要从硬件和算法两方面展开，一方面，通过调整系统的硬件结构，实现等频率间隔采样，在前端抑制扫频非线性并兼顾量程与分辨率。另一方面，在数字信号处理层面，通过使用各种算法在无需附加复杂光路的情况下改善空间分辨率和信噪比。对OFDR传感、解调等基本原理进行介绍，对空间分辨率、传感距离等影响OFDR系统性能的因素进行分析，着重整理了在提升OFDR系统性能关键技术的研究进展，最后提出OFDR所存在的问题以及展望了未来的发展趋势。 |
| 英文摘要: |
| Optical frequency domain reflectometry (OFDR) technology has become one of the core technologies for fiber optic diagnosis and precision measurement. It converts the nonlinearity of optical frequency scanning into compensable phase errors and combines frequency domain signal processing to achieve centimeter level spatial resolution and long-distance measurement. However, the nonlinearity and phase noise of tunable laser frequency scanning can affect the equal frequency sampling of the system, causing reflection broadening and distance deviation. Therefore, nonlinear compensation becomes the key to improving system performance. The research on nonlinear compensation mainly focuses on two aspects: hardware and algorithm. On the one hand, by adjusting the hardware structure of the system, equal frequency interval sampling can be achieved to suppress sweep nonlinearity at the front end while considering range and resolution. On the other hand, at the level of digital signal processing, various algorithms are used to improve spatial resolution and signal-to-noise ratio without the need for additional complex optical paths. This article will introduce the basic principles of OFDR sensing and demodulation, analyze the factors that affect the performance of OFDR systems such as spatial resolution and sensing distance, and focus on summarizing the research progress of key technologies in improving the performance of OFDR systems. Finally, the problems existing in OFDR and the future development trends are proposed. |
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