Novel frequency-agile interrogating system for fiber Bragg grating sensors

Ming Gang Xu; Harald Geiger; Jean-Luc Archambault; Laurence Reekie; John P. Dakin

doi:10.1117/12.165920

30 December 1993 Novel frequency-agile interrogating system for fiber Bragg grating sensors

Ming Gang Xu, Harald Geiger, Jean-Luc Archambault, Laurence Reekie, John P. Dakin

Proceedings Volume 2071, Distributed and Multiplexed Fiber Optic Sensors III; (1993) https://doi.org/10.1117/12.165920
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

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.

Citation Download Citation

Ming Gang Xu, Harald Geiger, Jean-Luc Archambault, Laurence Reekie, and John P. Dakin "Novel frequency-agile interrogating system for fiber Bragg grating sensors", Proc. SPIE 2071, Distributed and Multiplexed Fiber Optic Sensors III, (30 December 1993); https://doi.org/10.1117/12.165920

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