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Sensors 2013, 13(5), 5870-5880; doi:10.3390/s130505870
Article

Remote Interrogation of WDM Fiber-Optic Intensity Sensors Deploying Delay Lines in the Virtual Domain

*  and
Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Avda. de la Universidad, 30, 28911 Leganés, Madrid, Spain
* Author to whom correspondence should be addressed.
Received: 6 March 2013 / Revised: 9 April 2013 / Accepted: 3 May 2013 / Published: 7 May 2013
(This article belongs to the Special Issue Optomechatronics)
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Abstract

In this work a radio-frequency self-referencing WDM intensity-based fiber-optic sensor operating in reflective configuration and using virtual instrumentation is presented. The use of virtual delay lines at the reception stage, along with novel flexible self-referencing techniques, and using a single frequency, avoids all-optical or electrical-based delay lines approaches. This solution preserves the self-referencing and performance characteristics of the proposed WDM-based optical sensing topology, and leads to a more compact solution with higher flexibility for the multiple interrogation of remote sensing points in a sensor network. Results are presented for a displacement sensor demonstrating the concept feasibility.
Keywords: optical sensing; passive remote sensing; self-referencing; virtual delay line optical sensing; passive remote sensing; self-referencing; virtual delay line
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Montero, D.S.; Vázquez, C. Remote Interrogation of WDM Fiber-Optic Intensity Sensors Deploying Delay Lines in the Virtual Domain. Sensors 2013, 13, 5870-5880.

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