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Carbon-based materials have been considered as an efficient light-absorption component of film-type laser ultrasound transducers. Our previously designed laser ultrasound patch composed of candle soot nanoparticles and polydimethylsiloxane (CS/PDMS) composites showed high photoacoustic transducer efficiency than other carbon-based composites. In this study, we demonstrate that the carbon volume fraction...
In this letter, we introduce an improved phase-generated carrier (PGC) demodulation algorithm using reference compensation method to eliminate the influence of light intensity disturbance (LID) in interferometric fiber-optic sensors. In this method, the impacts of LID on acoustic signal and reference signal are the same. The impact of LID on reference signal can be measured via calculating the envelope...
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