30 August 2017 Photoacoustic signal detection using interferometric fiber-optic ultrasound transducers
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Abstract
The cross-section of a metallic sample was photoacoustically imaged using a pulsed nanosecond laser as the excitation source and a fiber-optic hydrophone system to acquire the pressure signal. The ultrasound sensor was an extrinsic Fabry-P´erot fiber-optic interferometer and the band-limited photodetected output signal was recorded in a digital oscilloscope. In order to reconstruct the image, a time set of ultrasound signals acquired in a circular scan around the sample were used to solve the time-reversal equations. It was observed that image contrast can be enhanced considering the deconvolution of the sensor frequency response from each measured pressure signal.
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Amanda D. Salas-Caridad, Amanda D. Salas-Caridad, Geminiano Martínez-Ponce, Geminiano Martínez-Ponce, Rodolfo Martínez-Manuel, Rodolfo Martínez-Manuel, } "Photoacoustic signal detection using interferometric fiber-optic ultrasound transducers", Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040B (30 August 2017); doi: 10.1117/12.2274569; https://doi.org/10.1117/12.2274569
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