SFDM/CWDM of fiber-optic Fizeau strain sensors

Author

Rao, Y.J. ; Zhou, C.X. ; Zhu, T.

Author_Institution

Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Sichuan, China

Volume

17

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1259

Lastpage

1261

Abstract

A novel method for multiplexing a large number of fiber-optic Fizeau sensors using coarse wavelength-division multiplexing (CWDM) and spatial frequency-division multiplexing (SFDM) is proposed and demonstrated. A CWDM device is used to multiplex signals from different sensor channels occupying different wavelength regions divided by the CWDM. More than 10 Fizeau sensors arranged in a single channel can be multiplexed by using SFDM due to the long cavity length of the Fizeau sensor. The experimental results show that a strain accuracy of /spl plusmn/5 μ/spl epsiv/ is achieved. As up to 100 sensors can be multiplexed simultaneously, this approach can improve the multiplexing capacity of Fizeau strain sensors significantly.

Keywords

fibre optic sensors; frequency division multiplexing; strain sensors; wavelength division multiplexing; CWDM; SFDM; coarse wavelength-division multiplexing; fiber-optic Fizeau strain sensors; sensor channels; spatial frequency-division multiplexing; Capacitive sensors; Composite materials; Frequency division multiplexing; Optical fiber devices; Optical fiber sensors; Optical fibers; Optical interferometry; Optical sensors; Sensor systems; Wavelength division multiplexing; Coarse wavelength-division multiplexing (CWDM); Fizeau interferometer; fiber-optic strain sensors; frequency-division multiplexing (FDM); multiplexing; optical fiber sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.847449

Filename

1432795