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Proceedings Paper

Novel frequency-agile interrogating system for fiber Bragg grating sensors
Author(s): Ming Gang Xu; Harald Geiger; Jean-Luc Archambault; Laurence Reekie; John P. Dakin
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Paper Abstract

We have demonstrated a new frequency-agile system for the interrogation of in-fiber Bragg grating sensors. The scheme involves frequency shift keying (FSK) of the rf drive to an acousto-optic tunable filter (AOTF) to track the wavelength shifts of a Bragg grating. Theoretical studies to derive the optimum frequency deviation for achieving maximum sensitivity are given, and experimental results are presented for temperature measurement. This technique is capable of rapid, random access and very wide tuning range, showing the potential for interrogating multiplexed arrays of Bragg-grating-based sensors.

Paper Details

Date Published: 30 December 1993
PDF: 7 pages
Proc. SPIE 2071, Distributed and Multiplexed Fiber Optic Sensors III, (30 December 1993); doi: 10.1117/12.165920
Show Author Affiliations
Ming Gang Xu, Univ. of Southampton (United Kingdom)
Harald Geiger, Univ. of Southampton (United Kingdom)
Jean-Luc Archambault, Univ. of Southampton (United Kingdom)
Laurence Reekie, Univ. of Southampton (United Kingdom)
John P. Dakin, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 2071:
Distributed and Multiplexed Fiber Optic Sensors III
Alan D. Kersey; John P. Dakin, Editor(s)

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