Characterization and modelling of an improved method of phase detection scheme for displacement optic sensors

Puscas, N.N., Gnewuch, H., Jackson, David A., Podoleanu, Adrian G.H. (2007) Characterization and modelling of an improved method of phase detection scheme for displacement optic sensors. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. 6744. Spie-Int Soc Optical Engineering ISBN 978-0-8194-6902-1. (doi:10.1117/12.738363) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1117/12.738363

Abstract

Based on a novel method for overcoming DC drift in RF subcarrier phase detection scheme for fibre optic sensors in this paper we propose an improved method for the measurement of small displacements and vibrations. The method works in open loop and is characterized by low distortions in the modulation process, good signal-to-noise ratio and rather low cost. Considering the receiver ideal, we obtained for the measurements of small distances a minimum of 0.74 μm with a 6.6 � 10-7 dB dynamic range. Also, we evaluated the probability density and modelled it vs the phase error for different values of the average number of photoelectrons generated by the signal and the phase noise parameter. The presented system can be exploited in the measurement of small distances, vibrations and seismic detection.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.738363
Uncontrolled keywords: Optic sensor; Phase detection scheme; Phase error; Phase noise parameter; Probability density; Small displacement measurements
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC355 Optics
T Technology > TA Engineering (General). Civil engineering (General) > TA1520 Optical Engineering
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 13:52 UTC
Last Modified: 29 May 2019 14:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49731 (The current URI for this page, for reference purposes)
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