Title :
FBG demodulation method based on DFB laser
Author :
Jie Liu ; Hong Zhao ; Peng Wang ; Liang Jiang ; Chao Huang
Author_Institution :
Coll. of Electr. & Electron. Eng., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
A demodulation system for fiber Bragg grating (FBG) is designed based on distributed feedback (DFB) laser. By use of adjusting the internal temperature, wavelength tunable lasers is achieved, and utilizing the laser to realize the demodulation of FBG sensing signal. The system uses all-fiber structure, with fast response and high precision demodulation. experimental results show that the method is accurate and stable to realize the demodulation of FBG sensing signal, the system minimum resolution can achieve 1pm, the dynamic range was up to 3nm.
Keywords :
Bragg gratings; demodulation; distributed feedback lasers; fibre optic sensors; laser tuning; FBG demodulation; distributed feedback laser; dynamic range; dynamic strain; fiber Bragg grating; high precision demodulation; wavelength tunable lasers; Demodulation; Fiber gratings; Fiber lasers; Temperature control; Voltage control; DFB laser; Dynamic strain; demodulation; fiber Bragg grating; sensitivity;
Conference_Titel :
Strategic Technology (IFOST), 2011 6th International Forum on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-4577-0398-0
DOI :
10.1109/IFOST.2011.6021237
