30-km distributed optical fiber Raman photon temperature lidar

Zaixuan Zhang; Honglin Liu; Ning Guo; Jianfeng Wang; Xiaobiao Wu; Xiangdong Yu; Haiqi Feng; Insoo S. Kim

doi:10.1117/12.466088

21 March 2003 30-km distributed optical fiber Raman photon temperature lidar

Zaixuan Zhang, Honglin Liu, Ning Guo, Jianfeng Wang, Xiaobiao Wu, Xiangdong Yu, Haiqi Feng, Insoo S. Kim

Proceedings Volume 4893, Lidar Remote Sensing for Industry and Environment Monitoring III; (2003) https://doi.org/10.1117/12.466088
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

The optical fiber Raman temperature (OFRT) Lidar is a real time, on line and multi-point temperature measurement system. 30k spot temperature information on space field can be measured and located the position by 30km OFRT Lidar It is a new technology integration of optical-mechanic-electric and computer. The system can take real time, on line measurement of spatial temperature field. In the system, optical fibers are both transmission media and sensing media. The intensity of anti-stokes Raman backscattering of optical fiber is modulated by the spatial temperature field where the optical fiber is laid. After signal processing and demodulation, the information of temperature can be extracted from the noise and can be displayed in real time. In time domain, using the velocity of light wave in optical fiber, the time interval ofback-direction light wave and optical fiber OTDR technology The amplification of anti-stokes Rairan spontaneous scattering (ARS) and the temperature effect have been first observed and applied to OFRT Lidar. The performance of OFRT Lidar is following: fiber length : 25.2km; temperature measuring range: O-lOOC(can be expand) temperature uncertainty: 2 C : temperature resolution: 0. 1 ; spatial resolution: Sm: measurement time: 5mm; Main unit operation temperature range: O—40t .The optical fiber sensor probes and the software for signal processing are also discussed. Keywords: Optical Fiber Raman Temperature (OFRT) Lidar, Optic Time Domain Reflection (OTDR),distributed optical fiber Raman photons temperature sensors, the temperature effect of Raman backscattering, Rayleigh backscattering, ZX band backscattering spectrum, optical fiber sensor probe.

Citation Download Citation

Zaixuan Zhang, Honglin Liu, Ning Guo, Jianfeng Wang, Xiaobiao Wu, Xiangdong Yu, Haiqi Feng, and Insoo S. Kim "30-km distributed optical fiber Raman photon temperature lidar", Proc. SPIE 4893, Lidar Remote Sensing for Industry and Environment Monitoring III, (21 March 2003); https://doi.org/10.1117/12.466088

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KEYWORDS

Optical fibers

Raman spectroscopy

LIDAR

Temperature metrology

Photons

Raman scattering

Autoregressive models

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