Abstract

This paper presents a fiber-optic quasi-distributed sensor for measurements of the multiple locations along a length of birefringent fiber to which lateral concentrating forces are applied. A broadband spectrum, modified with interference by a normal guided mode with the other cross-coupled modes, provides significant information about the cross-coupled locations resulting from the forces. The interference modification factor can be extracted from the modified spectrum, and its Fourier transform gives knowledge about the cross coupled locations.

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