基于光纤弯曲的光信号窃取方法研究  

The Optical Signal Tapping Technique Based on Fiber Bending

作　　者：赵峰[1] 邓大鹏[1] 史雅宁[1] 林初善[1] 

机构地区：[1]西安通信学院光纤通信教研室,西安710106

出　　处：《光纤与电缆及其应用技术》2010年第5期36-39,共4页Optical Fiber & Electric Cable and Their Applications

摘　　要：提出了基于光纤弯曲的光信号窃取方法,即"剥光缆,弯光纤,取信号,解信息"。通过推导光纤弯曲泄漏公式和考察两类光信号窃取影响因素,得出实施光信号隐蔽窃取所需的最佳光纤弯曲半径。在此理论指导下,设计了光信号窃取系统框架结构,并搭建了光信号窃取实验系统。理论和实验证明:光缆光信号窃取方法具有可行性,且隐蔽性好、不易被检测和发现。An optical signal tapping technique based on fiber bending is proposed, that is to ＂strip cable, bend fiber, acquire signal and demodulate information＂. By deriving the formula of fiber bending leakage and investigating two kinds of influence factors of optical signal tapping, the optimum fiber bending radius for hidden eavesdropping is obtained. Under the guidance of this theory the frame structure of the optical signal tapping system is designed, and the experimental system is set up. The theory and experiment show that it is feasible to tap optical signal from a fiber optic cable, and the method features good invisibility and difficult to be detected and found.

关 键 词：光纤弯曲泄漏 光信号窃取 弯曲半径 

分 类 号：TN911.74[电子电信—通信与信息系统]