基于高斯白噪声调制的布里渊光相干反射温度传感器  

Distributed Temperature Sensor with Brillouin Optical Correlation Reflectometry Based on White Gaussian Noise Modulation

作　　者：柴晶[1,2] 张明江[1,2] 刘毅[1,2] 张永宁[1,2] 刘慧[1,2] 李云亭[1,2] 

机构地区：[1]太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024 [2]太原理工大学物理与光电工程学院光电工程研究所,太原030024

出　　处：《光子学报》2015年第10期94-98,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61227016;61377089);山西省高等学校优秀青年学术带头人支持计划(No.2012lfjyt08);燃气管网数字化系统开发与示范项目(No.MQ2014-09)资助~~

摘　　要：根据光纤布里渊频移量随温度变化的特性,提出一种基于布里渊光相干反射技术的分布式光纤温度传感器.利用噪声信号的无周期特性,采用高斯白噪声信号对系统的光源进行电流调制,克服了现有布里渊光相干反射技术无法同时兼顾传感距离和空间分辨率的问题.实验研究表明,该传感器在253m的普通单模光纤上实现了分布式温度测量,获得了54.6cm的空间分辨率和±1.07℃的温度测量准确度.A scheme to measure the temperature distribution based on Brillouin optical correlation reflectometry was proposed according to the dependence of the Brillouin frequency shift on the temperature in the optical fiber.The white Gausssian noise signal was utilized to modulate the laser because of the non-periodicity of the noise,which could resolve the problem of the trade-off between the measurement range and the spatial resolution existed in conventional Brillouin optical correlation reflectometry systems.The experiment of temperature measurement was demonstrated in 253 mstandard single-mode optical fiber,with spatial resolution of 54.6cm and temperature accuracy of±1.07℃.

关 键 词：光纤传感器 布里渊散射 高斯噪声 调制 温度传感 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]