We report on a curvature sensor based on a long-period grating in a dual-concentric-core fiber. By measuring the relative shifting of two adjacent resonant dips, the curvature sensitivity reaches 7.635 nm/m−1.
We report on a curvature sensor based on a long-period grating in a dual-concentric-core fiber. By measuring the relative shifting of two adjacent resonant dips, the curvature sensitivity reaches 7.635 nm/m−1.