Title :
Ultra-Long-Distance Fiber Bragg Grating Sensor System
Author :
Saitoh, Takanori ; Nakamura, Kenichi ; Takahashi, Yoshifumi ; Iida, Hiroyuki ; Iki, Yoshimitsu ; Miyagi, Koichiro
Author_Institution :
Core Technol. R&D Center, Kanagawa
Abstract :
A long-distance fiber Bragg grating (FBG) sensor system has been developed using a wavelength-swept light source with output power turned on-off and timing synchronized to the sweep signal to reduce optical noise caused by Rayleigh scattering generated from the transmission fiber. This system can detect changes in the FBG reflection wavelengths even if the FBG is 120 km from the sensing position.
Keywords :
Bragg gratings; Rayleigh scattering; fibre optic sensors; optical fibres; optical noise; reflectivity; Rayleigh scattering; fiber Bragg grating sensor system; optical noise; reflection wavelengths; timing synchronization; transmission fiber; wavelength-swept light source; Bragg gratings; Fiber gratings; Light sources; Optical fiber sensors; Optical noise; Power generation; Rayleigh scattering; Sensor systems; Signal generators; Timing; Optical fibers; Rayleigh scattering; strain measurement; wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.904918
