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

Volume

13

Issue

4

fYear

2013

fDate

41365

Firstpage

1315

Lastpage

1319

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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2012.2235064

Filename

6387253