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Proceedings Paper

High Dynamic Dual Mode Fiber Transitometry
Author(s): Georges Kotrotsios; Pierre Denervaud; Lucien Falco; Olivier Parriaux
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Paper Abstract

A high dynamic range, short response time distributed fiber sensor for control and surveyance applications is presented. It uses the differential mode delay between the LP01 and LP11 modes of a conventional singlemode communication fiber used at 800 nm wavelength. Baseband readout of the relative phase and amplitude delivers information on the location of an event and on the magnitude of the measurand activating a microbending transducer which couples the originally excited dominant mode to the LP11 mode. The spatial separation and focalisation of the two modes can be performed with a 40 dB isolation by means of a monolithic microoptic component acting on the evanescent fields. A dedicated vector voltmeter with 0.1° phase accuracy at 10 MHz provides a transitometry spatial resolution of the order of 10 meters.

Paper Details

Date Published: 23 February 1989
PDF: 7 pages
Proc. SPIE 1011, Fiber Optic Sensors III, (23 February 1989); doi: 10.1117/12.949302
Show Author Affiliations
Georges Kotrotsios, Centre Suisse d'Electronique et de Microtechnique S.A. (Switzerland)
Pierre Denervaud, Centre Suisse d'Electronique et de Microtechnique S.A. (Switzerland)
Lucien Falco, Centre Suisse d'Electronique et de Microtechnique S.A. (Switzerland)
Olivier Parriaux, Centre Suisse d'Electronique et de Microtechnique S.A. (Switzerland)

Published in SPIE Proceedings Vol. 1011:
Fiber Optic Sensors III
Ralf Th. Kersten, Editor(s)

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