Title :
A novel sensor interrogation technique using chirped fiber grating based Sagnac loop
Author :
Zhao, Donghui ; Shu, Xuewen ; Zhang, Lin ; Bennion, Ian
Author_Institution :
Electron. Eng., Aston Univ., Birmingham, UK
Abstract :
We demonstrate a novel and simple sensor interrogation scheme for fiber Bragg grating (FBG) based sensing systems. In this scheme, a chirped FBG based Sagnac loop is used as a wavelength-dependent receiver, and a stable and linear readout response is realised. It is a significant advantage of this scheme that the sensitivity and the measurement wavelength range can be easily adjusted by controlling the chirp of the FBG or using an optical delay line in the Sagnac loop.
Keywords :
Bragg gratings; Sagnac interferometers; fibre optic sensors; optical delay lines; sensitivity; FBG-based sensing systems; chirped fiber grating based Sagnac loop; fiber Bragg grating; linear readout response; measurement wavelength range adjustment; optical delay line; sensitivity adjustment; sensor interrogation technique; stable readout response; wavelength-dependent receiver; Bragg gratings; Chirp; Fiber gratings; Optical control; Optical fiber sensors; Optical receivers; Optical sensors; Sagnac interferometers; Sensor systems; Wavelength measurement;
Conference_Titel :
Sensors, 2002. Proceedings of IEEE
Print_ISBN :
0-7803-7454-1
DOI :
10.1109/ICSENS.2002.1037316
