【摘要】 针对当前分布式光纤震动传感系统中存在的震动信号获取问题,采用一种全新的光路形式,设计了一种基于双M-Z干涉仪方案的分布式光纤震动传感系统。系统采用3×3解调方案,从采集的传感器输出信号中解调出目标震动信号,且目标震动信号无失真。偏振控制器的引入避免了系统的偏振衰落现象。在此基础上搭建了实验测试系统,对外界目标信号进行了测试,测试结果表明,系统可以无失真探测目标信号,并对目标进行定位,定位误差为20 m,验证了系统的可行性。更多还原

【Abstract】 A form of fiber-optic vibration-sensing system based on the dual Mach-Zehnder fiber interferometric scheme is designed. The system uses 3 × 3 demodulation scheme,with the function of obtaining the goal information without distortion and positioning the outside target signal. Moreover,the experimental system is constructed and the feasibility of the system scheme is verified.更多还原