中文摘要：

为了解决以往光纤通信局域网断点故障检测方法成本高、动态检测区间小的问题，提出基于混沌光的光纤通信局域网断点故障检测方法。构建可调谐混沌光产生装置，将混沌光波长失调值设为0nm，带宽设为光纤通信局域网带宽的80％，获取混沌光，构成光纤通信局域网信道的参考信号和探测信号，利用光纤振荡器过滤其中的延时信号，对混沌光信号与探测信号进行相关性运算，获取断点故障定位值。实验结果表明，所提方法在检测断点故障时的动态检测区间大，并能维持光纤通信正常运行。

英文摘要：

Since the previous breakpoint fault detection method of optical fiber communication LAN has high cost and narrow dynamic detection section, a chaotic light based breakpoint fault detection method of optical fiber communication LAN is proposed. The generation device of tunable chaotic light was constructed to set the wavelength detuning value of the chaotic light to 0 nm and the bandwidth of the fiber communication LAN to 80%. The chaotic light is got to compose the reference signal and detection signal of the optical fiber communication LAN channel. The optical fiber oscillator is adopted to filter the delay signal. The correlation operation is carried out for the chaotic light signal and detection signal to obtain the positioning value of break- point fault. The experimental results indicate that the method has long dynamic detection section while detecting the breakpoint fault, and can maintain the normal operation of optical fiber communication.