Modelling and performance analysis of a fibre-grating interrogation system using an acousto-optic tunable filter
Xu, M.G., Geiger, H. and Dakin, J.P. (1996) Modelling and performance analysis of a fibre-grating interrogation system using an acousto-optic tunable filter. IEEE Journal of Lightwave Technology, 14, (3), 391-396. (doi:10.1109/50.485598).
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The performance of a fiber grating interrogation system using an acousto-optic tunable filter (AOTF) is analyzed. An equivalent linear circuit is presented to describe the system, which tracks the wavelength of a fiber Bragg grating (FBG) sensor in a FBG sensor array. From the model, the tracking resolution of a shot-noise-limited system has been determined for both transmissive and reflective interrogation of FBG's. An optimum ratio between the bandwidths of the FBG and the AOTF has been derived. Experimental results of a tracking system are presented to validate the theoretical predictions. The theory should also be suitable for interrogation systems using other forms of tunable bandpass filters for tracking the FBG wavelength.
|Digital Object Identifier (DOI):||doi:10.1109/50.485598|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||11 Mar 2010|
|Last Modified:||31 Mar 2016 13:13|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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