Fiber Bragg grating sensor array system based on digital phase generated carrier demodulation and reference compensation method

Author

He, Jun ; Li, Fang ; Xiao, Hao ; Liu, Yuliang

Author_Institution

Optoelectron. Syst. Lab., Chinese Acad. of Sci., Beijing, China

fYear

2008

fDate

7-9 Nov. 2008

Firstpage

1

Lastpage

4

Abstract

A novel fiber Bragg grating (FBG) sensor array system based on digital phase generated carrier (PGC) demodulation and reference compensation method is proposed and set up. Experimental results confirm that the digital PGC demodulation can be used for wavelength-division-multiplexed FBG sensor array and the reference compensation method can reduce the environmental interference by approximately 40 dB in the frequency range from 20 Hz to 2 kHz. The minimum detectable wavelength-shift of the sensor system is 1times10^-3 pm/ radicHz.

Keywords

Bragg gratings; demodulation; fibre optic sensors; wavelength division multiplexing; digital phase generated carrier demodulation; fiber Bragg grating sensor array system; reference compensation method; wavelength division multiplexing; Bragg gratings; Demodulation; Fiber gratings; Interference; Phase shifting interferometry; Phased arrays; Sensor arrays; Sensor systems; Temperature sensors; Wavelength division multiplexing; Fiber Bragg grating (FBG) sensor; phase generated carrier (PGC); reference compensation method; wavelength division multiplexing;

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.2008.5226293

Filename

5226293