Abstract
The influence of the wavelength dispersion on the temperature accuracy of the Raman distributed temperature sensor system (RDTS) is analyzed in detail, and a simple correction algorithm is proposed to compensate the fiber position error caused by the wavelength dispersion. The principle of the proposed algorithm is described theoretically, and the correction on each point along the entire fiber is realized. Temperature simulation results validate that the temperature distortion is corrected and the temperature accuracy is effectively improved from ±5 °C to ±1 °C.
Highlights
The Raman distributed temperature sensor (RDTS) system has attracted much attention for decades [1,2,3]
The vast majority of the Raman distributed temperature systems described in literature employ the optical time-domain reflectometry (OTDR) technique to realize the accurate space orientation
The high-performance InGaAs avalanche photodiodes (APDs) integrated with the Weijie WANG et al.: Wavelength Dispersion Analysis on Fiber-Optic Raman Distributed Temperature Sensor System multi-amplifying circuit are chosen for detection. effectively, and the corresponding experimental
Summary
The Raman distributed temperature sensor (RDTS) system has attracted much attention for decades [1,2,3]. Owing to its immunity to the electromagnetic interference, the capability of handling much higher bandwidth, safety in hazardous conditions, the distributed temperature sensor (DTS) system has found successful implementation in various application fields, such as power cable monitoring, leakage-detection of oil pipelines and health monitoring of dams [4, 5]. Weijie WANG et al.: Wavelength Dispersion Analysis on Fiber-Optic Raman Distributed Temperature Sensor System multi-amplifying circuit are chosen for detection. A high-speed data acquisition (DAQ) card verification will be carried out in our future work. Converts analog signals to digital signals and accomplishes 105 or 106 times sample averaging simultaneously [7, 8]
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