Fiber optical intensity-ratio refractometer with digital display

Janis Spigulis; Juris Lazdins; George Barens

doi:10.1117/12.170678

10 March 1994 Fiber optical intensity-ratio refractometer with digital display

Janis Spigulis, Juris Lazdins, George Barens

Proceedings Volume 2068, Chemical, Biochemical, and Environmental Fiber Sensors V; (1994) https://doi.org/10.1117/12.170678
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

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.

Citation Download Citation

Janis Spigulis, Juris Lazdins, and George Barens "Fiber optical intensity-ratio refractometer with digital display", Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); https://doi.org/10.1117/12.170678

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