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Frontiers of Optoelectronics

Front Optoelec Chin    2009, Vol. 2 Issue (2) : 159-162     DOI: 10.1007/s12200-009-0023-y
RESEARCH ARTICLE |
Temperature performance of Raman scattering in data fiber and its application in distributed temperature fiber-optic sensor
Deming LIU(), Shuang LIU, Hairong LIU
Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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Abstract

A wavelength division multiplexer (WDM) was used to extract the Raman scattering signal from a data fiber. The temperature performance of Raman scattering spectrum was studied theoretically and experimentally. On the base of this study, a distributed fiber-optic temperature sensor (DFTS) system was developed. The sensing distance was 4?km. The temperature accuracy and the distance resolution reached to±1°C and±1?m, respectively. The system is stable and adequate for commercial usage, such as the power industry, the underground tunnel, the subway, and the pipe laying, and also for the mission applications, such as the warship and the airplane.

Keywords fiber-optic sensor      distributed temperature sensor      data fiber      Raman scattering     
Corresponding Authors: LIU Deming,Email:dmliu@mail.hust.edu.cn   
Issue Date: 05 June 2009
 Cite this article:   
Deming LIU,Shuang LIU,Hairong LIU. Temperature performance of Raman scattering in data fiber and its application in distributed temperature fiber-optic sensor[J]. Front Optoelec Chin, 2009, 2(2): 159-162.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-009-0023-y
http://journal.hep.com.cn/foe/EN/Y2009/V2/I2/159
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Hairong LIU
Fig.1  Backscattering spectrum of data fiber
Fig.2  Configuration of WDM device
Fig.3  Band transmission performance of WDM device
Fig.4  Temperature response of backscattering spectrum of data fiber
Fig.5  Schematic of DFTS experimental system
Fig.6  Measured temperature distribution
optical fibertemperature accuracymeasured temperature rangedistance resolutionmeasured distance range
62.5/125?μm graded index- data fiber±2°C-40°C-140°C±2?m4?km
Tab.1  Specifications of fiber distributed temperature-sensing system
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