基于宽带光源和自外差检测的布里渊光时域反射温度传感系统

发布时间：2018-01-16 21:08

  本文关键词：基于宽带光源和自外差检测的布里渊光时域反射温度传感系统　出处：《光子学报》2016年11期 　论文类型：期刊论文

  更多相关文章： 光纤光学 布里渊散射 瑞利散射 自外差检测 布里渊频移

【摘要】：为简化系统结构、减小相干瑞利噪声对系统性能的影响,提出了一种采用宽带光源的瑞利和布里渊散射自外差检测布里渊光时域反射温度传感系统.分析了瑞利和布里渊自外差检测原理,研究了布里渊频移和自外差信号功率与光纤温度和应变的关系.设计并搭建采用宽带光源的自外差检测布里渊光时域反射温度传感系统,获得了常温下沿光纤分布的自外差信号功率谱及不同温度时加温段光纤的功率谱,验证了布里渊频移和自外差信号相对功率变化随温度的线性增加关系.通过实验数据获得的布里渊频移和相对功率变化的温度系数分别为1.07±0.01MHz/℃和(0.37±0.09)%/℃.本文的研究结果为基于瑞利和布里渊自外差检测布里渊光时域反射传感系统的温度和应变同时测量提供了理论和实验依据.
[Abstract]:In order to simplify the system structure and reduce the influence of coherent Rayleigh noise on the system performance. A Brillouin optical time domain reflectance temperature sensing system based on Rayleigh and Brillouin scattering self-heterodyne detection is proposed, and the principle of Rayleigh and Brillouin self-heterodyne detection is analyzed. The relationship between Brillouin frequency shift and self heterodyne signal power and fiber temperature and strain is studied. A Brillouin optical time domain temperature sensing system based on wide band heterodyne detection is designed and built. The power spectrum of the self-heterodyne signal distributed along the fiber at room temperature and the power spectrum of the fiber at different temperature are obtained. The linear relationship between the relative power variation of Brillouin frequency shift and autoheterodyne signal with temperature is verified. The temperature coefficients of Brillouin frequency shift and relative power variation obtained from experimental data are 1.07 卤0.01M, respectively. HZ / C and (. The results in this paper provide theoretical and experimental basis for simultaneous measurement of temperature and strain in Brillouin optical time domain reflectance sensing system based on Rayleigh and Brillouin self-heterodyne.
【作者单位】： 华北电力大学电子与通信工程系;
【基金】：国家自然科学基金(No.61377088) 河北省自然科学基金(Nos.F2014502098,F2015502059) 中央高校基本科研业务费专项资金(No.2014XS77)资助~~
【分类号】：TP212
【正文快照】： 1-4006011frequency shiftOCIS Codes:060.2370;290.5830;290.59000引言自1989年Culverhouse D等提出将受激布里渊散射(Stimulated Brillouin Scattering,SBS)作为一种分布式温度传感机理以来[1-3],布里渊光纤传感技术得到了广泛研究.其中,布里渊光时域反射(BrillouinOptical ，

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