| 摘要: |
| 针对目前常见的同时需要大动态范围和高空间分辨率的应用，提出了基于频率调制连续
波（FMCW）技术的光缆线路异常检测方法，分析了系统空间分辨率与光源扫描速率、频谱分
析仪分辨率带宽之间的关系，讨论了非线性扫频、相位噪声对系统空间分辨率的影响，搭建
了FMCW检测实验系统，得到了光纤后向散射曲线，分别在24.54 km和49.55 km的单
模光纤检测中得到了8.22 m和11.32 m的反射事件的空间分辨率，提高了反射事件
的空间分辨率。 |
| 关键词: 光缆线路 性能监测 异常检测方法 频率调制连续波 空间分
辨率 非线性扫频 |
| DOI： |
|
| 基金项目: |
|
| Anomaly detect method for optical fiber cable line based on FMCW |
| WANG Ying-jie,DENG Da-peng,LI Wei |
| () |
| Abstract: |
| According to the demand of long distance detection and high spatial re
solution simultaneously, an anomaly detect method based on Frequentcy Modulated
Continuous Wave(FMCW) is put forward. The relationships among the spatial resolu
tion, optical frequency sweep rate and the spectrum bandwidth of the analyser ar
e analysed. The influence of optical frequency sweep nonlinearity and phase-nois
e on the spatial resolution of the FMCW detect system is also discussed. In the
experiments of the FMCW detector, the spatial resolutions of 8.22.6 m and
11.32.3 m are achieved at 24.54km and 49.55 km single mode optical fi
bers, respectively. The spatial resolution of reflective event is improved. |
| Key words: optical fiber cable line performance monitoring anomaly detect method frequentcy
modulated continuous wave(FMCW) spatial resolution optical frequency sweep no
nlinearity |
