Title :
A Novel Fiber Bragg Grating Sensor Configuration for Long-Distance Quasi-Distributed Measurement
Author :
Fu, H.Y. ; Liu, H.L. ; Chung, W.H. ; Tam, H.Y.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong
Abstract :
A novel fiber Bragg grating (FBG) sensor configuration using three broadband light sources of different wavelength bands for the interrogation of FBG sensors distributed over 75 km of fiber is proposed and demonstrated. Rayleigh backscattering was reduced and a 60-dB effective dynamic range was demonstrated.
Keywords :
Bragg gratings; Rayleigh scattering; backscatter; distributed sensors; fibre optic sensors; light sources; superradiance; FBG sensor; Rayleigh backscattering; amplified spontaneous emission; broadband light sources; distance 75 km; fiber Bragg grating sensor; long-distance quasidistributed measurement; Backscatter; Bragg gratings; Dynamic range; Fiber gratings; Light sources; Optical fiber sensors; Sensor arrays; Sensor systems; Strain measurement; Temperature sensors; Amplified spontaneous emission (ASE) source; Rayleigh backscattering; dynamic range; fiber Bragg grating (FBG);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2008.929082
