From Event: SPIE Optical Engineering + Applications, 2017
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.
Amanda D. Salas-Caridad, Geminiano Martínez-Ponce, and Rodolfo Martínez-Manuel, "Photoacoustic signal detection using interferometric fiber-optic ultrasound transducers," Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040B (Presented at SPIE Optical Engineering + Applications: August 09, 2017; Published: 30 August 2017); https://doi.org/10.1117/12.2274569.
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