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

fYear

2008

fDate

7-9 Nov. 2008

Firstpage

1

Lastpage

4

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 Â¿V/Â¿Â¿ 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APOS.2008.5226305

Filename

5226305