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Interrogation of extrinsic Fabry-Perot interferometric sensors using arrayed waveguide grating devices

Niewczas, P. and Dziuda, L. and Fusiek, G. and Willshire, A.J. and McDonald, J.R. and Thursby, G.J. and Harvey, D. and Michie, W.C. (2003) Interrogation of extrinsic Fabry-Perot interferometric sensors using arrayed waveguide grating devices. IEEE Transactions on Instrumentation and Measurement, 52 (8). pp. 1092-1096. ISSN 0018-9456

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Abstract

In this paper we present details of a solid state interrogation system based on a 16-channel arrayed waveguide grating (AWG) for interrogation of extrinsic Fabry-Perot interferometric (EFPI) sensors. The sensing element is configured in a reflecting mode and is illuminated by a broad-band light source through an optical fiber. The spectrum of light reflected from the sensor is analyzed using an AWG device acting as a coarse spectrometer. Using measurement points from the AWG channels, the original spectrum of the sensing element is reconstructed by a means of curve fitting. This allows sufficient information for the position of the reflection peak (or inverted peak) to be uniquely determined and the value of a measurement quantity obtained. In addition to the theoretical simulations of the proposed measurement system, we provide details of the laboratory evaluation using an EFPI strain sensor.

Item type: Article
ID code: 3552
Keywords: arrayed waveguide gratings, Fabry-Pérot sensors, strain sensors, sensors, electric 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: 14 Jun 2007
    Last modified: 04 Sep 2014 11:42
    URI: http://strathprints.strath.ac.uk/id/eprint/3552

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