Small-Diameter Thin FBGs Ideally Suited for Embedded Sensing in Composites

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Author: Kevin Hsu, Andrei Csipkes, and Tommy Jin
Tuesday, October 11, 2016
Technica Optical Components LLC

For many advanced embedded-FBG sensing applications it has become necessary and critical that the sensing fibers have small dimension, light weight, and low bend sensitivity in order to allow easy embedding with minimal compromise on the strength of the host materials. Specifically, fiber-optic sensing applications typically use a standard single-mode fiber (SMF) where the core/clad/coating diameters are ~8/125/250 µm. However, when the standard SMF sensors are embedded inside composite materials, the mechanical performance of the composites could be compromised due to local stress concentration.

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