Title :
Distributed Temperature Sensing System Based on Rayleigh Scattering BOTDA
Author :
Cui, Qingsong ; Pamukcu, Sibel ; Lin, Aoxiang ; Xiao, Wen ; Herr, Douglas ; Toulouse, Jean ; Pervizpour, Mesut
Author_Institution :
Sch. of Instrum. Sci. & Opto-Electron. Eng., Beihang Univ., Beijing, China
Abstract :
A distributed temperature sensor based on Rayleigh scattering Brillouin optical time domain analysis (Rayleigh-BOTDA) is proposed in this paper. The sensor uses Rayleigh backscattering effect of microwave modulated pulse base sidebands as probe wave and a high sensitive photon counting detector for Brillouin signal intensity detection. Compared with a conventional BOTDA system, the Rayleigh-BOTDA effectively suppresses polarization-induced signal fluctuation resulting in improved signal intensity. The experimental scheme presented is simplified by using a single laser with one-end access. The temperature accuracy of the new sensing system was demonstrated as 1°C on spatial resolution of 3 m.
Keywords :
Rayleigh scattering; backscatter; distributed sensors; photon counting; pulse modulation; temperature sensors; time-domain analysis; BOTDA; Brillouin optical time domain analysis; Brillouin signal intensity detection; Rayleigh backscattering effect; Rayleigh scattering; distributed temperature sensor; microwave modulated pulse base sidebands; photon counting detector; Frequency modulation; Optical fiber polarization; Optical fiber sensors; Probes; Scattering; Temperature measurement; Fiber optic sensor; frequency modulation; photon counting detector; stimulated Brillouin scattering;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2010.2066558
