Title :
Intensity-Modulated Fiber Bragg Grating Sensor System Employing Fiber Dispersion
Author :
Dong, Xinyong ; Tam, H.Y. ; Shum, P.
Author_Institution :
Coll. of Opt. & Electron. Technol., China Jiliang Univ., Hangzhou
Abstract :
A novel intensity-modulated fiber Bragg grating (FBG) sensor system employing fiber dispersion is presented. A RF signal is generated at a photodetector by two modulated optical signals reflected from a sensing and a reference FBG. Bragg wavelength shift of the sensing FBG changes intensity of the RF signal due to a fiber dispersion-induced phase change, with temperature effect being compensated automatically by the reference FBG. Strain measurement with a maximum sensitivity of -0.34 muV/muepsiv has been achieved.
Keywords :
Bragg gratings; fibre optic sensors; intensity modulation; optical fibre communication; optical fibre dispersion; optical modulation; photodetectors; strain measurement; strain sensors; Bragg wavelength shift; RF signal generation; compensated temperature effect; fiber dispersion-induced phase change; intensity-modulated fiber bragg grating sensor system; modulated optical signal; photodetector; strain measurement; Bragg gratings; Dispersion; Fiber gratings; Optical fiber sensors; Optical modulation; Optical sensors; Photodetectors; RF signals; Sensor systems; Signal generators;
Conference_Titel :
PhotonicsGlobal@Singapore, 2008. IPGC 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-3901-0
Electronic_ISBN :
978-1-4244-2906-6
DOI :
10.1109/IPGC.2008.4781447
