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5 September 2002 Design of pulsed light source in distributed optical fiber temperature sensing system
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Abstract
Distributed optical fiber temperature sensor use the principle of temperature effect of spontaneous Raman scattering in fiber and optical domain time reflection (OTDR) to detect the temperature field in space and its changing with time. It can sense the temperature changes along the fiber length by the continuous form of distance in a fiber of several kilometers length. Theoretically, the minimal discernible space length of fiber in the distributed optical fiber temperature sensor system is proportional to the width of incident light pulse, that is, the narrower the width of incident light pulse, the higher the space resolution of fiber. The width, power and edge quality of incident light pulse can directly influence the space and temperature resolution of distributed optical fiber temperature sensing system. This paper focused on the optimum design of light pulse producing based on the use of LD light source. A high power light pulse of narrower width is produced by designing reasonable circuit of increasing voltage, discharging control and making full use of LD, which makes sure to improve the space and temperature resolution of the system.
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Peiguo Hou, Yutian Wang, Yanhong Zhang, and Longjiang Zheng "Design of pulsed light source in distributed optical fiber temperature sensing system", Proc. SPIE 4913, Semiconductor Lasers and Applications, (5 September 2002); https://doi.org/10.1117/12.482232
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