Title :
EDF-Based Edge-Filter Interrogation Scheme for FBG Sensors
Author :
Tiwari, Usha ; Thyagarajan, K. ; Shenoy, M.R. ; Jain, S.C.
Author_Institution :
Vertical -4 (Photonics), Central Sci. Instrum. Organ. (CSIR-CSIO), Chandigarh, India
Abstract :
A fiber Bragg grating (FBG) sensor employing an interrogation scheme based on erbium-doped fiber (EDF) edge detection filter, with enhanced detection bandwidth and intrinsic temperature insensitivity, is proposed and experimentally demonstrated. The edge filter is based on the spectral dependence of absorption in EDF with the possibility of tailoring the absorption profile using appropriate lengths of EDF. A wide filter bandwidth of about 10 nm and a slope detection sensitivity of 1.0 dB/nm in the C-band is demonstrated and validated by simulation results. The proposed scheme is versatile and allows for simultaneous interrogation of multiple FBGs.
Keywords :
Bragg gratings; edge detection; erbium; fibre optic sensors; light absorption; optical fibre filters; C-band; EDF-based edge-filter interrogation; FBG sensors; absorption profile; detection bandwidth; erbium-doped fiber edge detection filter; fiber Bragg grating sensor; intrinsic temperature insensitivity; spectral absorption; spectral dependence; Fiber gratings; Optical fiber sensors; Optical fibers; Strain; Temperature measurement; Erbium-doped fiber (EDF); fiber Bragg gratings (FBG); fiber optics sensors;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2012.2235064
