基于EDFA的分布式光纤喇曼温度解调技术

薛野; 江山; 印新达; 宋珂; 董雷

doi:10.3969/j.issn.1001-806.2012.04.028

基于EDFA的分布式光纤喇曼温度解调技术

1.
武汉邮电科学研究院, 武汉430074;
2.
武汉理工光科股份有限公司, 武汉430074

作者简介: 薛野(1985- ),男,硕士研究生,主要研究方向为分布式光纤传感..

通讯作者: 江山, jshan@wri.com.cn ;

中图分类号: TP212.1⁺1;TN247

Temperature demodulation technology of distributed optical fiber temperature sensors based on EDFA

1.
Wuhan Research Institute of Post and Telecommunication, Wuhan 430074, China;
2.
WUTOS Technology Co.Ltd., Wuhan 430074, China

Corresponding author: JIANG Shan, jshan@wri.com.cn ;

CLC number: TP212.1⁺1;TN247

摘要: 为了消除掺铒光纤放大器的放大自发辐射噪声对分布式光纤温度传感器测温精度的影响,采用精确的修正公式进行温度解调是一种有效手段。通过分析掺铒光纤放大器的放大自发辐射噪声对系统产生的影响,并将计算的中间结果代入理论公式获得了修正后的温度解调公式。实验中分别采用理论公式和修正公式对温度进行分布式测量并获得了实验数据。结果表明,修正后的温度解调公式有效补偿了掺铒光纤放大器噪声引起的误差,并显著提高了系统的信噪比和测温精度;修正公式可将系统的整体测温精度提高到1℃～2℃;此外,实验中观察到多模光纤中喇曼背向自发散射同样会出现放大现象,这与单模光纤中的情形类似,且放大喇曼自发散射依然具有理想的温度效应。
- 传感器技术 /
- 温度解调公式 /
- 放大喇曼自发散射 /
- 放大自发辐射噪声
Abstract: In order to eliminate the effect of amplified spontaneous emission(ASE) noise of Er-doped fiber amplifiers(EDFA)on the temperature measuring precision of distributed optical fiber temperature sensors,a precise modified formula is an effective means.Firstly,the influence of ASE noise in EDFA was analyzed,and then the temperature demodulation formula was modified with intermediate calculation results.Secondly,based on the theoretical and modified formula,the temperature was tested,and the results were compared.Analysis results indicate that the modified temperature demodulation formula can efficiently compensate errors due to ASE noise and improve the signal-to-noise ratio of the system and measurement precision of the temperature obviously.The experimental results show that the temperature precision is raised to 1℃ ~2℃ by using the modified formula.Moreover,amplified Raman spontaneous scattering is also observed in multimode fibers as the same as in single mode fibers and causes amplified Raman spontaneous scattering curve distortion.However,amplified Raman spontaneous scattering exhibits ideal temperature effect.
- sensor technique /
- temperature demodulation formula /
- amplified Raman spontaneous scattering /
- amplified spontaneous emission noise

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基于EDFA的分布式光纤喇曼温度解调技术

作者简介: 薛野(1985- ),男,硕士研究生,主要研究方向为分布式光纤传感..

通讯作者: 江山, jshan@wri.com.cn ;

Temperature demodulation technology of distributed optical fiber temperature sensors based on EDFA

Corresponding author: JIANG Shan, jshan@wri.com.cn ;

计量

基于EDFA的分布式光纤喇曼温度解调技术

通讯作者: 江山, jshan@wri.com.cn;

作者简介: 薛野(1985- ),男,硕士研究生,主要研究方向为分布式光纤传感.

English Abstract

Temperature demodulation technology of distributed optical fiber temperature sensors based on EDFA

Corresponding author: JIANG Shan, jshan@wri.com.cn

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基于EDFA的分布式光纤喇曼温度解调技术

作者简介: 薛野(1985- ),男,硕士研究生,主要研究方向为分布式光纤传感..

通讯作者: 江山, jshan@wri.com.cn ;

Temperature demodulation technology of distributed optical fiber temperature sensors based on EDFA

Corresponding author: JIANG Shan, jshan@wri.com.cn ;

计量

出版历程

基于EDFA的分布式光纤喇曼温度解调技术

通讯作者: 江山, jshan@wri.com.cn;

作者简介: 薛野(1985- ),男,硕士研究生,主要研究方向为分布式光纤传感.

English Abstract

Temperature demodulation technology of distributed optical fiber temperature sensors based on EDFA

Corresponding author: JIANG Shan, jshan@wri.com.cn

全文HTML

目录