2 June 2011 Optoacoustic fiber optic interferometric sensors for biomedical applications
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Abstract
A non-metallic interferometric optical fiber ultrasonic wideband sensor is presented for optoacoustic imaging applications. The ultrasonic sensitivity of intrinsic fiber optic interferometric sensors depends strongly of the material which is composed of. We compare experimentally the acoustic sensitivity of two fiber optic sensors based on singlemode silica optical fiber and multimode graded-index perfluorinated polymer optical fiber, respectively. Both sensors are designed for detection of optoacoustic wave sources with frequencies in the range from 100 kHz to 5 MHz. These results are also compared with a PVDF ultra wideband sensor. We evaluated detection of real world optoacoustic signals, generated from an optically absorbing object embedded in a tissue mimicking phantom, between our silica optical fiber sensor and an array of piezoelectric transducers. Reconstructed two dimensional acoustic images of the phantom are presented and compared with images obtained with the Laser Optoacoustic Imaging System, LOIS-64B, demonstrating the feasibility of our fiber optic sensor as a wideband ultrasonic sensor.
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Daniel Gallego, Daniel Gallego, Horacio Lamela, Horacio Lamela, } "Optoacoustic fiber optic interferometric sensors for biomedical applications", Proc. SPIE 8028, Fiber Optic Sensors and Applications VIII, 80280O (2 June 2011); doi: 10.1117/12.884326; https://doi.org/10.1117/12.884326
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