Loss-compensation technique using a split-spectrum approach for optical fiber air-gap intensity-based sensors

Anbo Wang; Mark S. Miller; Michael F. Gunther; Kent A. Murphy; Richard O. Claus

doi:10.1117/12.141268

5 March 1993 Loss-compensation technique using a split-spectrum approach for optical fiber air-gap intensity-based sensors

Anbo Wang, Mark S. Miller, Michael F. Gunther, Kent A. Murphy, Richard O. Claus

Author Affiliations +

Proceedings Volume 1795, Fiber Optic and Laser Sensors X; (1993) https://doi.org/10.1117/12.141268
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

A self-referencing technique compensating for fiber losses and source fluctuations in air-gap intensity-based optical fiber sensors is described and demonstrated. A resolution of 0.007 micron has been obtained over a measurement range of 0-250 microns for an intensity-based displacement sensor using this referencing technique. The sensor is shown to have minimal sensitivity to fiber bending losses and variations in the LED input power. A theoretical model for evaluation of step-index multimode optical fiber splice is proposed. The performance of the sensor as a displacement sensor agrees well with the theoretical analysis.

Citation Download Citation

Anbo Wang, Mark S. Miller, Michael F. Gunther, Kent A. Murphy, and Richard O. Claus "Loss-compensation technique using a split-spectrum approach for optical fiber air-gap intensity-based sensors", Proc. SPIE 1795, Fiber Optic and Laser Sensors X, (5 March 1993); https://doi.org/10.1117/12.141268

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