Interrogation of fibre-optic interferometric sensorsusing acousto-optic tunable filter
- 17 August 1995
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 31 (17) , 1487-1488
- https://doi.org/10.1049/el:19951037
Abstract
A new technique for the interrogation of interferometric-based fibre-optic 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 shift of a single fringe peak from an interferometric sensor. Experimental results are presented for a Fizeau interferometer. The technique provides high accuracy, plus a large unambiguous tracking range free from interruptions.Keywords
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