Mid-infrared photoacoustic spectroscopy using piezoelectric transducer

Ryota Sasaki; Saiko Kino; Yuji Matsuura

doi:10.1117/12.2648833

6 March 2023 Mid-infrared photoacoustic spectroscopy using piezoelectric transducer

Ryota Sasaki, Saiko Kino, Yuji Matsuura

Proceedings Volume PC12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII; PC123720I (2023) https://doi.org/10.1117/12.2648833
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

For non-invasive measurement of biological tissue, a piezoelectric photoacoustic spectroscopy system detecting ultrasound induced by irradiation of mid-infrared laser light was developed. In this work, a photoacoustic spectrum of poultry breast meat was obtained with this proposed method. Although photoacoustic spectra characterizing the optical absorption of the meat were obtained, the sensitivity was slightly less than conventional PAS. Therefore, an investigation to improve the measurement sensitivity was also performed by using standing waves in the sample. As a result, the sensitivity was successfully improved utilizing this effect, and obtained a human skin spectrum of fat and sugar absorption appeared.

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Citation Download Citation

Ryota Sasaki, Saiko Kino, and Yuji Matsuura "Mid-infrared photoacoustic spectroscopy using piezoelectric transducer", Proc. SPIE PC12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII, PC123720I (6 March 2023); https://doi.org/10.1117/12.2648833

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KEYWORDS

Photoacoustic spectroscopy

Mid-IR

Transducers

Absorption

Laser development

Ultrasonography

Laser tissue interaction

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