FMCW multiplexing of fiber Bragg grating sensors

Peter K C Chan; Wei Jin; M. Süleyman Demokan

doi:10.1109/2944.892615

FMCW multiplexing of fiber Bragg grating sensors

Peter K C Chan
, Wei Jin
, M. Süleyman Demokan

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

44 Citations (Scopus)

Abstract

We report on the use of frequency-modulated continuous wave (FMCW) techniques for multiplexing fiber Bragg grating (FBG) sensors. This technique is based on the modulation of light intensity from a broadband source by a linear swept-frequency RF carrier. Signals from the FBG sensors located at different positions in an array are separated in frequency domain and demodulated using a tunable optical filter. The potential and limitation of the technique are discussed. A three-sensor FMCW multiplexed FBG array of parallel topology and a six-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 με resolution in terms of root mean square (RMS) strain value.

Original language	English
Pages (from-to)	756-763
Number of pages	8
Journal	IEEE Journal on Selected Topics in Quantum Electronics
Volume	6
Issue number	5
DOIs	https://doi.org/10.1109/2944.892615
Publication status	Published - 1 Sept 2000

ASJC Scopus subject areas

Electrical and Electronic Engineering
Atomic and Molecular Physics, and Optics

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10.1109/2944.892615

http://hdl.handle.net/10397/374

Cite this

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ER -

FMCW multiplexing of fiber Bragg grating sensors

Abstract

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