摘要
研究了一种使用2×2耦合器将附加环耦合到萨格奈克主环上的分布式光纤传感预警系统.采用单模光纤和脉冲光源,在时域上提取光不同次经过附加环的干涉光束多重响应.理论推导和仿真试验证明,比较多重响应的幅度能够探测发生在主环里因外界破坏事件引起的振动所在位置.提出了准确定位的数学模型,其定位方法与外界作用的频率特性无关.
A novel distributed optical fiber sensing system was proposed. The monomode fiber and impulse light source were exploited. So the muhi-responses of interference beams were extracted when they passed sub-ring different times. It is proved theoretically and experimentally that the position of vibration occurred in the main ring,which is caused by breakage event outside,can be detected by comparing the amplitude of multi-responses. The function of definite locating was indicated. The position detection does not depend on the frequency characteristics.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2009年第5期1118-1121,共4页
Acta Photonica Sinica
关键词
分布式光纤传感
预警
干涉
位置探测
振动
Distributed optic fiber sensor
Destruction alarm
Interference
Position determination
Vibration
