本文關(guān)鍵詞：基于寬帶光源和自外差檢測(cè)的布里淵光時(shí)域反射溫度傳感系統(tǒng)　出處：《光子學(xué)報(bào)》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 光纖光學(xué) 布里淵散射 瑞利散射 自外差檢測(cè) 布里淵頻移

【摘要】：為簡(jiǎn)化系統(tǒng)結(jié)構(gòu)、減小相干瑞利噪聲對(duì)系統(tǒng)性能的影響,提出了一種采用寬帶光源的瑞利和布里淵散射自外差檢測(cè)布里淵光時(shí)域反射溫度傳感系統(tǒng).分析了瑞利和布里淵自外差檢測(cè)原理,研究了布里淵頻移和自外差信號(hào)功率與光纖溫度和應(yīng)變的關(guān)系.設(shè)計(jì)并搭建采用寬帶光源的自外差檢測(cè)布里淵光時(shí)域反射溫度傳感系統(tǒng),獲得了常溫下沿光纖分布的自外差信號(hào)功率譜及不同溫度時(shí)加溫段光纖的功率譜,驗(yàn)證了布里淵頻移和自外差信號(hào)相對(duì)功率變化隨溫度的線性增加關(guān)系.通過實(shí)驗(yàn)數(shù)據(jù)獲得的布里淵頻移和相對(duì)功率變化的溫度系數(shù)分別為1.07±0.01MHz/℃和(0.37±0.09)%/℃.本文的研究結(jié)果為基于瑞利和布里淵自外差檢測(cè)布里淵光時(shí)域反射傳感系統(tǒng)的溫度和應(yīng)變同時(shí)測(cè)量提供了理論和實(shí)驗(yàn)依據(jù).
[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 鹵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.
【作者單位】： 華北電力大學(xué)電子與通信工程系;
【基金】：國(guó)家自然科學(xué)基金(No.61377088) 河北省自然科學(xué)基金(Nos.F2014502098,F2015502059) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(No.2014XS77)資助~~
【分類號(hào)】：TP212
【正文快照】： 1-4006011frequency shiftOCIS Codes:060.2370;290.5830;290.59000引言自1989年Culverhouse D等提出將受激布里淵散射(Stimulated Brillouin Scattering,SBS)作為一種分布式溫度傳感機(jī)理以來[1-3],布里淵光纖傳感技術(shù)得到了廣泛研究.其中,布里淵光時(shí)域反射(BrillouinOptical ，

本文編號(hào)：1434810