应用于物联网的光纤布里渊传感系统设计

Design of fiber Brillouin sensing system applied to internet of things

采用当前方法设计光纤布里渊传感系统时,系统在光纤中区分距离较近的2个点能力较弱,传感器到达设定测量精度花费的时间较长,存在空间分辨率低和时间分辨率低的问题。提出应用于物联网的光纤布里渊传感系统设计方法,对布里渊信号检测技术进行了分析,具体包括直接探测技术和相干探测技术。在此基础上通过选择光源、电光调制器、声光调制器、掺铒光纤放大器、光电探测器和偏振控制器构成光纤布里渊传感系统的结构,结合布里渊传感技术完成光纤布里渊传感系统的设计。实验结果表明,该方法设计的光纤布里渊传感系统的空间分辨率高、时间分辨率高。

When using current method to design a fiber Brillouin sensing system,the system has a weaker ability to distinguish two points closer to each other in the fiber.The time it takes for sensor to reach set measurement accuracy is long,and there is low spatial resolution and time resolution.The design method of fiber Brillouin sensing system applied to internet of things is proposed,and the Brillouin signal detection technology is analyzed,including direct detection technology and coherent detection technology.On this basis,the fiber Brillouin sensing system is constructed by selecting a light source,an electro-optic modulator,an acousto-optic modulator,an erbium-doped fiber amplifier,a photodetector,and a polarization controller.And the Brillouin sensing technology is used to complete fiber Brillouin sensing system design.The experimental results show that the fiber Brillouin sensing system designed by this method has high spatial resolution and high time resolution.