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Proceedings Paper

Noncrosslinked organosilicon matrix for luminescence-quenching-based fiber optic oxygen sensors
Author(s): Ganapati R. Mauze; Robert R. Holloway
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Paper Abstract

We have developed a silica-filled, noncrosslinked, organosilicon matrix for trapping a luminescent dye. The matrix is used for fiber optic oxygen sensing based on the luminescence quenching phenomenon. The rheological properties of the matrix material are such that it simplifies fabrication of the extremely small sensors required for intra-arterial applications. The dye seems to be distributed between sites in the continuous organosilicon phase and the dispersed silica phase. The relative populations in the two phases can be adjusted by certain additives which generate compounds that elute silica, such as acetic acid. The quenching constant of the system depends not only on the presence or absence of such eluants, but on the chemical nature of the additive as well. We were able to tailor the composition of matrix so as to optimize the sensitivity over the physiological range of oxygen concentration. Our observations on the composition dependence of the oxygen sensitivity of the matrix are presented.

Paper Details

Date Published: 21 May 1993
PDF: 10 pages
Proc. SPIE 1886, Fiber Optic Sensors in Medical Diagnostics, (21 May 1993); doi: 10.1117/12.144826
Show Author Affiliations
Ganapati R. Mauze, Hewlett-Packard Co. (United States)
Robert R. Holloway, Hewlett-Packard Co. (United States)

Published in SPIE Proceedings Vol. 1886:
Fiber Optic Sensors in Medical Diagnostics
Fred P. Milanovich, Editor(s)

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