Frequency division multiplexing of FBG sensors using an FMCW approach

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

Frequency division multiplexing of FBG sensors using an FMCW approach

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

The Hong Kong Polytechnic University

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

Abstract

We report on the use of a frequency-modulated continuous wave (FMCW) technique 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 3-sensor FMCW multiplexed FBG array of parallel topology and a 6-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 με resolution in terms of root-mean-square strain value.

Original language	English
Pages (from-to)	305-310
Number of pages	6
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4073
Publication status	Published - 1 Jan 2000
Event	5TH European Conference on Smart Structures and Materials - Glasgow, United Kingdom Duration: 22 May 2000 → 24 May 2000

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

Cite this

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title = "Frequency division multiplexing of FBG sensors using an FMCW approach",

abstract = "We report on the use of a frequency-modulated continuous wave (FMCW) technique 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 3-sensor FMCW multiplexed FBG array of parallel topology and a 6-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 με resolution in terms of root-mean-square strain value.",

author = "Chan, {Peter K C} and Wei Jin and Demokan, {M. S.}",

year = "2000",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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TY - JOUR

T1 - Frequency division multiplexing of FBG sensors using an FMCW approach

AU - Chan, Peter K C

AU - Jin, Wei

AU - Demokan, M. S.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - We report on the use of a frequency-modulated continuous wave (FMCW) technique 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 3-sensor FMCW multiplexed FBG array of parallel topology and a 6-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 με resolution in terms of root-mean-square strain value.

AB - We report on the use of a frequency-modulated continuous wave (FMCW) technique 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 3-sensor FMCW multiplexed FBG array of parallel topology and a 6-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 με resolution in terms of root-mean-square strain value.

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M3 - Conference article

SN - 0277-786X

VL - 4073

SP - 305

EP - 310

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - 5TH European Conference on Smart Structures and Materials

Y2 - 22 May 2000 through 24 May 2000

ER -

Frequency division multiplexing of FBG sensors using an FMCW approach

Abstract

ASJC Scopus subject areas

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