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An arrayed waveguide grating based multiplexer and interrogator for Fabry-Perot sensors

Willshire, A.J. and Niewczas, P. and McDonald, J.R. (2005) An arrayed waveguide grating based multiplexer and interrogator for Fabry-Perot sensors. IEEE Sensors Journal, 5 (5). pp. 964-969. ISSN 1530-437X

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Abstract

In this paper, we propose an interrogation system capable of multiplexing four identical Fabry-Perot (FP) interferometric sensors using two wavelength-division multiplexing devices. One is a 40-channel DWDM channel monitor, the other a four-channel CWDM device. The sensors are connected to the output channels of the CWDM device in order to assign a portion of the spectrum to each sensor. The reflected spectra are then analyzed using the DWDM channel monitor. By monitoring the power incident on each of the DWDM channels, the four sensor reflection spectra can be reconstructed in software and information relating to the measurand obtained. Based on software simulations and previous laboratory experiments with single sensors, it is predicted that this system would be capable of interrogating four EFPI strain sensors simultaneously at frequencies greater than 5 kHz with a resolution of approximately 2 /spl mu//spl epsiv/ and a range of 3000 /spl mu//spl epsiv/.

Item type: Article
ID code: 4670
Keywords: Fabry-Perot interferometers, arrayed waveguide gratings distributed sensors, multiplexing, optical sensors, electrical systems, Electrical engineering. Electronics Nuclear engineering, Instrumentation, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Professional Services > Corporate Services Directorate
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 08 Nov 2007
    Last modified: 04 Sep 2014 16:41
    URI: http://strathprints.strath.ac.uk/id/eprint/4670

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