Title :
A Simple Demodulation Method for FBG Temperature Sensors Using a Narrow Band Wavelength Tunable DFB Laser
Author :
Yan, Lian Shan ; Yi, Anlin ; Pan, Wei ; Luo, Bin
Author_Institution :
Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China
Abstract :
A simple demodulation method for a fiber Bragg grating (FBG) temperature sensor is proposed and demonstrated, which uses a low cost commercial temperature-controlled wavelength scanning distributed-feedback (DFB) laser, a sensing FBG and a low-speed photodetector (PD). Relative high resolution is achieved by utilizing an FBG with enhanced temperature sensitivity design. Such a method may be suitable for applications requiring moderate resolution and low cost implementations.
Keywords :
Bragg gratings; demodulation; distributed feedback lasers; fibre optic sensors; laser tuning; photodetectors; remote sensing by laser beam; temperature sensors; FBG temperature sensors; demodulation method; fiber Bragg grating temperature sensor; low-speed photodetector; narrow band wavelength tunable DFB laser; temperature-controlled wavelength scanning distributed-feedback laser; Bragg gratings; Costs; Demodulation; Fiber gratings; Fiber lasers; Laser modes; Narrowband; Photodetectors; Temperature sensors; Tunable circuits and devices; Distributed-feedback (DFB) laser; fiber Bragg grating (FBG); temperature sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2060478
