提出了一种集相关法距离测量和可视化故障查找于一体的光纤故障定位方法。利用外光反馈红光半导体激光器产生的宽带红光混沌作为探测信号，通过对故障点反射的回波信号与参考信号进行互相关处理实现光纤故障的距离测量；结合故障位置因探测红光泄漏而具有的可视性，实现了单、多故障点的可测可视化定位。结果表明，该方法可初步实现分辨率为3.9 cm、与动态范围无关、测量范围约为500 m的故障事件可测可视化定位。

A method for fiber fault location with distance measurement and visual fault search is presented. Broadband red chaotic signal, generated by utilizing the optical feedback of a red diode laser, is used as the signal light. Distance measurement between initial point and fiber fault is obtained by correlation between reference and back reflected signal waveform. Further visible search is realized by the dazzling spot at fault position owing to the leakage of signal light exactly. Experimental results demonstrate that the proposed method can realize the locations of single and multiple fiber faults, and the fiber fault at about 500 m is measured with a resolution of 3.9 cm, which is independent of the range of the fault position.