提出一种利用宽带混沌信号检测传输线断点故障的方法,并利用混沌半导体激光器进行了实验验证。该方法利用激光器的非线性产生宽带混沌激光,并光电转换为宽带混沌电信号;将混沌信号分为两路分别作为参考信号和探测信号,通过相关法对比参考信号确定探测信号的回波延时、定位断点。断点定位精度和分辨率取决于回波延时的分辨率。实验结果表明,利用普通的半导体激光器即可实现7.5 cm的分辨率。 A method to detect the fault of the transmission line by using broadband chaotic signal is proposed. The experiment is validated by the chaotic semiconductor laser. The method uses the laser nonlinearity to generate broadband chaotic laser and converts it into broadband chaotic electrical signal. The chaotic signal is divided into two channels respectively as the reference signal and the detection signal, and the correlation reference signal is used to determine the echo delay of the detection signal , Locate the breakpoint. Breakpoint positioning accuracy and resolution depends on the echo delay resolution. The experimental results show that the resolution of 7.5 cm can be achieved by using an ordinary semiconductor laser.