Abstract

A high-spatial-resolution strain sensor in OFDR was experimentally demonstrated by use of combining distance compensation (DC) and image wavelet denoising (IWD) method. Compared with using one method alone, the measured distribution strain could be varied from 200 to 2000 με at a spatial resolution of 2.56 mm. Moreover, four times enhancement of the accuracy for the strain senor was achieved without hardware modification. This method is a significant step toward a high performance OFDR system, especially for evaluating the rapid change of object's structural condition.

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Strain measurement with adaptive local feature extraction method based on special fiber OFDR system

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