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Proceedings Paper

Fiber optic oxygen sensor detection system for aerospace applications
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Paper Abstract

This paper describes a novel multi-point fiber optic microsensor (optrode) based on dynamic luminescence quenching that is being developed for measuring oxygen leak detection for space applications. The sensor optrodes employ the quenching by oxygen of the fluorescence from a ruthenium complex. These optrodes were fabricated using Ruthenium-based fluorescent indicator immobilized in a porous glass rod placed at the end of multimode fiber. The light from a blue LED is launched into the optrode via a fiber optic bundle and used as the excitation source. The optrode's fluorescent emission intensity in the range of 0% to 10% oxygen is measured as a function of time. The measuring system is based on high reliability and low cost. The system consists of four units: 1) temperature compensated oxygen optrodes combined with a optical setup, 2) multipoint sensor communication fiber optic network cable, 3) digital/analogue optoelectronic signal processing unit with built-in micro controller for control of data acquisition and processing, and 4) a laptop computer for data display and storage. In testing, the sensor exhibited excellent response time and reversibility.

Paper Details

Date Published: 1 March 2001
PDF: 8 pages
Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); doi: 10.1117/12.417402
Show Author Affiliations
Alex A. Kazemi, Boeing Co. (United States)
Edgar A. Mendoza, Intelligent Optical Systems, Inc. (United States)
Lothar U. Kempen, Intelligent Optical Systems, Inc. (United States)
Robert A. Lieberman, Intelligent Optical Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 4204:
Fiber Optic Sensor Technology II
Brian Culshaw; Michael A. Marcus; Brian Culshaw; James A. Harrington; Michael A. Marcus; Mohammed Saad, Editor(s)

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