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A brief review of recent progress in researches, productions and applications of full distributed fiber Raman photon sensors at China Jiliang University (CJLU) is presented. In order to improve the measurement distance, the accuracy, the space resolution, the ability of multi-parameter measurements, and the intelligence of full distributed fiber sensor systems, a new generation fiber sensor technology...
Principles and application of distributed optical fiber temperature sensor (DTS) are introduced. Applications of DTS in power system in Shanghai World Expo project and Shanghai Caojing thermal power plant are studied as examples. Problems and solutions are researched. Test results of the two examples engineering project are listed.
Working principle of distributed optical fiber temperature sensor (DTS) system is introduced briefly in his paper. And factors affecting stability of DTS system are discussed. Electromagnetic interference and environmental temperature are important factors to stability of the DTS system. Metal shield is used to reduce electromagnetic interference. Temperature compensation circuit and sampling correction...
A distributed optical fiber sensor (DOFS) system with a sensing distance of 10 km was developed for applications in coal mine temperature measurement and fire alarm. The achieved temperature resolution and uncertainty are 0.1 and ±2°C, respectively. And the spatial resolution and measurement time are 3 m and 12 s, respectively.
Distributed optical fiber temperature sensor (DTS) for underground coal gasification (UCG) system using is studied in this paper. By measuring temperature of reacting mine gasification process can be controlled. Calibration of DTS and experiment result are introduced. The results show that, DTS can play an important role in UCG systems.
In forward pumped S band discrete DCF fiber Raman amplifier (FRA), amplification effect of forward stimulated Brillouin scattering (SBS) lines has been observed. Pump threshold power of Stokes SBS lines in forward pumped FRA is tested. That of the first order Stokes SBS (FSB1-), second order Stokes SBS (FSB2-) and third order SBS (FSB3-) are 1.5 mW, 1.4 mW and 1.7 mW respectively. Stokes SBS lines...
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