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Proceedings Paper

Fiber optical intensity-ratio refractometer with digital display
Author(s): Janis Spigulis; Juris Lazdins; George Barens
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Paper Abstract

Simplicity, cost efficiency, and higher fidelity compared to the single-channel design are the main advantages stimulating the recent interest on fiber optic intensity-ratio sensors. Optical and electronic designs of refractometric sensors of this kind are discussed here. Two optical schemes of retroreflective probes with one input and two output fibers are proposed. The probe sensitivity to liquid refractivity changes in the interval 1.33 < n < 1.41 is studied by computer simulation. An originally developed one-ADC-based signal processing circuit providing digital display of the intensity-ratio determined n-values is described as well.

Paper Details

Date Published: 10 March 1994
PDF: 5 pages
Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); doi: 10.1117/12.170678
Show Author Affiliations
Janis Spigulis, Univ. of Latvia (Latvia)
Juris Lazdins, Univ. of Latvia (Latvia)
George Barens, Univ. of Latvia (Latvia)

Published in SPIE Proceedings Vol. 2068:
Chemical, Biochemical, and Environmental Fiber Sensors V
Robert A. Lieberman, Editor(s)

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