Xu, M.G., Geiger, H., Archambault, J.L., Reekie, L. and Dakin, J.P.
Novel interrogating system for fibre Bragg grating sensors using an acousto-optic tunable filter
Electronics Letters, 29, (17), . (doi:10.1049/el:19931006).
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A new technique for the interrogation of in-fibre Bragg grating sensors using an acousto-optic tunable filter (AOTF) is demonstrated. The scheme involves frequency shift keying (FSK) of the RF drive to the AOTF to track the wavelength shifts of a Bragg grating. Experimental results are presented for temperature measurement. This technique provides a frquency-agile system, capable of rapid, random access and very wide tuning range.
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