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带光纤环的分布式光纤拉曼温度系统
引用本文:张利勋,刘永智,欧中华,代志勇,彭增寿,王大文.带光纤环的分布式光纤拉曼温度系统[J].强激光与粒子束,2006,18(12):1955-1958.
作者姓名:张利勋  刘永智  欧中华  代志勇  彭增寿  王大文
作者单位:1.电子科技大学 光电信息学院, 成都 610054; 2. 中国电子科技集团 第八研究所, 安徽 淮南 23001
基金项目:中国电子科技集团第八研究所合作项目资助课题
摘    要: 为了抑制分布式光纤拉曼温度系统的温漂和瑞利散射光窜扰反斯托克斯散射光,在传感光纤前端盲区后放置光纤取样环,用瑞利散射光解调反斯托克斯散射光及用光纤取样环的温度计算光纤线上其它点的温度,提高了系统的测温精度和稳定性。采用功率100 mW,波长1.55 μm,脉宽10 ns脉冲激光器和15 dB前置光纤放大器,100M14bitA/D转换卡及DSP作数字平均构建光纤拉曼温度系统的实验,实现了测温误差在±0.03 ℃内。

关 键 词:拉曼散射光  瑞利散射光  分布式光纤  温度系统
文章编号:1001-4322(2006)12-1955-04
收稿时间:2006-02-23
修稿时间:2006-09-25

Distributed optical fiber Raman temperature system with a optical fiber ring
ZHANG Li-xun,LIU Yong-zhi,OU Zhong-hua,DAI Zhi-yong,PENG Zeng-shou,WANG Da-wen.Distributed optical fiber Raman temperature system with a optical fiber ring[J].High Power Laser and Particle Beams,2006,18(12):1955-1958.
Authors:ZHANG Li-xun  LIU Yong-zhi  OU Zhong-hua  DAI Zhi-yong  PENG Zeng-shou  WANG Da-wen
Institution:1.School of Optoeletronic Information, University of Electronic Science and Technology of China,Chengdu 610054, China;2.The 8th Institute of China Electronic Technology Group Corporation, Huainan 230001, China
Abstract:For restraining the temperature excursion accumulation and the anti-Stokes back-scattering intermingling with the Rayleigh back-scattering, an optical fiber sampling ring was set after an inswept death section of the sensing optical fiber. The anti-Stokes back-scattering was demodulated by Rayleigh back-scattering and the fiber's temperature was calculated by the sampling ring, which advanced the temperature precision and stability of the system. A 10 ns, 100 mW, 1.55 μm pulse laser, a 15 dB gain of EDFA, two high sensitive and low noise APD, two100M14bitA/D and two DSP chips using for 212~213 digital average form the experimental system. The spatial resolution of 1 m and temperature resolution of 0.03 ℃ were achieved using these techniques.
Keywords:Raman back-scattering  Rayleigh-back scattering  Distributed optical fiber  Temperature
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