Title :
A novel temperature-compensated, intensity-modulated fiber Bragg grating sensor system
Author :
Dong, Xinyong ; Tam, Hwa-Yaw
Author_Institution :
Key Lab. of Zhejiang Province on Modern Meas. Technol. & Instrum., China Jiliang Univ., Hangzhou, China
Abstract :
An intensity-modulated, fiber Bragg grating (FBG) sensor system based on radio-frequency (RF) signal measurement is presented. The RF signal is generated at a photodetector by two modulated optical signals reflected from the sensing FBG and a reference one. Bragg wavelength shift of the sensing FBG changes intensity of the RF signal by changing phase difference between the two optical signals, with temperature effect being compensated automatically by the reference FBG. Strain measurement with a maximum sensitivity of -0.34 ¿V/¿¿ has been achieved.
Keywords :
Bragg gratings; compensation; fibre optic sensors; optical modulation; strain measurement; strain sensors; Bragg wavelength shift; FBG sensor; fiber Bragg grating sensor system; intensity-modulated fiber sensor; phase difference; photodetector; radio-frequency signal measurement; sensitivity; strain measurement; temperature-compensated fiber sensor; Bragg gratings; Fiber gratings; Optical modulation; Optical sensors; Photodetectors; RF signals; Radio frequency; Sensor systems; Signal generators; Wavelength measurement; Optical fiber sensing; fiber Bragg gratings; intensity-modulated; strain;
Conference_Titel :
Optical Fiber Sensors Conference, 2008. APOS '08. 1st Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2131-2
Electronic_ISBN :
978-1-4244-2132-9
DOI :
10.1109/APOS.2008.5226305
