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Abstract:We demonstrate for the first time that photonic time-stretch frequency domain reflectometry (PTS-FDR) enables ultrafast and high spatial-resolution crack detection using fully distributed chirped fiber Bragg grating strain sensors.
Abstract-A novel ultrafast and high spatial-resolution interrogation method for fully distributed chirped fibre Bragg grating sensors based on photonic time-stretch frequency-domain reflectometry is presented. Real-time interrogation at measurement speed of 50 MHz with a spatial resolution of 35 µm was experimentally demonstrated.
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