【摘要】 提出了一种基于马赫-泽德(M-Z)干涉仪原理的分布式光纤振动传感与定位的技术,该技术可实时检测整个光纤沿线发生的振动信息,并利用该技术设计了一种安防报警系统。分析了该系统的定位工作原理,理论分析和模拟实验表明系统具有很高的检测灵敏度。在总长度为18.46 km的光纤上进行了实验,系统实时地给出振动的位置,平均定位误差为42 m,将光源功率增至300μW,可对长度26 km的光纤上的振动信号进行定位。更多还原

【Abstract】 A new distributed fiber optic perturbation sensing and locating technology based on the Mach-Zehnder(M-Z) interferometers was studied.This technology can be used to detect the perturbation along all fiber in real-time.Based on this technology,a security system was designed,and the locating principle of this system was analyzed.The result of the theoretic analysis and the experiment showed that the measurement sensitivity of the detecting perturbation is greatly improved.Experimenting on the type disturbance’s optic cable and forcing on the 18.46 km long distance fiber,the system correctly showed the position in real time and the average location error is 42 m.The experiment showed that the system can be applicable for locating on 26 km distance fiber cable when the power of the laser resource increases to 300 μW.更多还原