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Proceedings Paper

Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source
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Paper Abstract

A reflective array of optical fiber sensors multiplexed in time and with their status read using coherence sensing associated with directly modulated multimode laser diode illumination is investigated. Sensor sensitivity as determined by primary noise sources is evaluated and numeric results are presented. The concept is demonstrated with two all fiber Michelson interferometers and applied to the measurement of periodic and quasi-static parameters. It is shown that the effect of feedback light into the laser cavity on the level of the system noise floor is negligible, making unnecessary the use of source optical isolation.

Paper Details

Date Published: 1 January 1992
PDF: 10 pages
Proc. SPIE 1586, Distributed and Multiplexed Fiber Optic Sensors, (1 January 1992); doi: 10.1117/12.56518
Show Author Affiliations
Jose Luis Santos, Univ. of Kent at Canterbury (United Kingdom)
David A. Jackson, Univ. of Kent at Canterbury (United Kingdom)

Published in SPIE Proceedings Vol. 1586:
Distributed and Multiplexed Fiber Optic Sensors
Alan D. Kersey; John P. Dakin, Editor(s)

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