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Proceedings Paper

DSP-based measuring system for temperature-compensated fiber optical oxygen sensors
Author(s): Christian Stehning; Gerhard A. Holst
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Paper Abstract

A new signal processing approach for fiberoptical sensors, microoptodes, is presented. All signal generation and processing is completely based on a fast, low-cost DSP (Digital Signal Processor). This enables the implementation of new features such as a simultaneous multi-frequency measurement to resolve different analytical parameters in the luminescence signal. For instance, a hybrid sensor was applied to simultaneously sense the temperature and oxygen concentration, and the temperature information was used to compensate for the temperature effect on the oxygen measurement. As a further benefit, recent improvements in indicator chemistry and fiber tip preparation also yield a luminescence signal level high enough to be detected with a common photodiode instead of a photomultiplier tube. Consequently, the combination of small detectors and highly integrated DSPs enable portable, handheld measurement devices with very little calibration requirements.

Paper Details

Date Published: 14 February 2002
PDF: 12 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456078
Show Author Affiliations
Christian Stehning, Max-Planck-Institut fuer Marine Mikrobiologie (Germany)
Gerhard A. Holst, Max-Planck-Institut fuer Marine Mikrobiologie (Germany)

Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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