Abstract: fiber communication becomes more and more important, this paper first analyzes fiber information leakage detection methods, including point to point the lowspeed communication and high speed DWDM communication coherent detection method. Based on the corresponding detection principle, we get actual test results and analysis, which reveal that the information leakage risks. According to the optical information leakage risks, protection method of optical fiber information based on optical frequency domain reflectometry is introduced.

Key words: coherent detection, optical leakage, OFDR, DWDM

摘要： 针对光纤信息泄漏的检测方法，分为点对点的低速通信的直接检测与高速DWDM通信的相干检测方法；首先介绍对应的检测原理，然后给出实际测试结果与分析，进而指出目前的光纤通信系统存在信息泄漏的隐患.针对光纤信息泄漏的隐患，提出基于OFDR光频域反射检测的光纤信息的防护方法,并给出针对无源光网络的检测方法及结果分析.

关键词: 相干检测, 光纤泄漏, 光频域反射检测, 密集波分复用