Title :
Experimental Demonstration of Multipoint Temperature Warning Sensor Using a Multichannel Matched Fiber Bragg Grating
Author :
Sun, Qizhen ; Liu, Deming ; Xia, Li ; Wang, Jian ; Liu, Hairong ; Shum, P.
Author_Institution :
Coll. of Optoelectron. Sci. & Eng., Huazhong Univ. of Sci. & Technol., Wuhan
fDate :
6/1/2008 12:00:00 AM
Abstract :
A novel time-division-multiplexing fiber Bragg grating (FBG) sensor for multipoint temperature warning sensor is proposed and demonstrated. A multiwavelength pulsed laser based on a multichannel matched FBG is employed. The sensor array consists of multiple uniform FBGs at different positions and with different nominal wavelengths. When the temperature exceeds the threshold at a certain position, the light at the corresponding time slot and wavelength can be detected. The sensor provides a simple and flexible solution to locate the abnormal temperature increase with different tolerable thresholds at different locations.
Keywords :
Bragg gratings; fibre optic sensors; optical pulse shaping; temperature sensors; time division multiplexing; fiber Bragg grating sensor; multichannel matched; multipoint temperature warning sensor; multiwavelength pulsed laser; time division multiplexing; Bragg gratings; Fiber gratings; Fiber lasers; Optical fiber polarization; Optical pulses; Optical sensors; Semiconductor optical amplifiers; Sensor arrays; Temperature sensors; Time division multiplexing; Fiber Bragg grating (FBG); multichannel fiber Bragg grating (FBG); temperature warning sensor; time-division multiplexing (TDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.922903
