Fiber Fault Detection With High Accuracy Using Chaotic Signal From an SOA Ring Reflectometry

A simple optical reflectometry with a semiconductor optical amplifier ring structure is proposed for the first time to locate the accurate fiber fault position using the chaotic correlation detection method. The experimental results show that a much higher spatial resolution of about 50 $\mu{\rm m}$ and a measured stability of ${\pm}{\rm 150}~\mu{\rm m}$ are achieved.