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Owing to the optoacoustic effect, a composite of light-absorbing and elastomeric materials can generate ultrasound waves when it is illuminated by a pulse laser. Recently, the optoacoustic transducers with the effect and their applications have been intensively investigated. However, the waveform of the generated ultrasound waves by the optoacoustic transducers have not been clarified so far. We reported that the measured waveforms of the shockwaves from an optoacoustic plane transducer made of CNT/PDMS composite which were coated on a poly(methyl methacrylate) (PMMA) substrate. In this study, we have measured the waves from the optoacoustic transducer by using NDT transducers with narrow bandwidth, and confirmed the waveform of the shockwaves by considering the receiving impulse responses of the NDT transducers.
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