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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 22 — Aug. 1, 2014
  • pp: E47–E50

Exploring a photo-acousto-optic effect for noncontacting photoacoustic sensing

Bor-Wen Yang, Hong-You Chen, Yu-Siang Huang, Hong-Wei Chen, Hing-Yang Yu, and D. C Yeh  »View Author Affiliations

Applied Optics, Vol. 53, Issue 22, pp. E47-E50 (2014)

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To avoid the use of ultrasound transducers and coupling gel in photoacoustic microscopy (PAM), we propose photo-acousto-optic tomography (PAOT) for noncontact photoacoustic (PA) sensing. The process consists of two parts. The first portion is the same as typical PAM, which employs a pulsed laser to induce acoustic waves. The difference from typical methods lies in the second part of the process, which applies a DC beam, rather than a conventional transducer, to sense the PA signal. A two-beam optical microscope system was designed to verify the PAOT effect, whereby an AC spot acted as the source to induce a PA signal, while a DC beam is applied to induce the acousto-optic effect for detection of the acoustic wave. We demonstrated the preliminary result that 5–100 Hz AC radiation could derive PA waves in a water-like medium along with detection sensitivity as high as 4.9%–10.0%; besides, the signal waveform could be detected by a DC spot 10–100 μm away for noncontact sensing with detection sensitivity of about 3.7%–10.4%. Without the need for a transducer or coupling gel, PAOT has the potential to modify conventional PAM into a pure optical system, which could make PA imaging more promising in practical applications.

© 2014 Optical Society of America

OCIS Codes
(170.5120) Medical optics and biotechnology : Photoacoustic imaging
(170.1065) Medical optics and biotechnology : Acousto-optics

Original Manuscript: February 27, 2014
Revised Manuscript: June 2, 2014
Manuscript Accepted: June 6, 2014
Published: July 9, 2014

Virtual Issues
Vol. 9, Iss. 10 Virtual Journal for Biomedical Optics

Bor-Wen Yang, Hong-You Chen, Yu-Siang Huang, Hong-Wei Chen, Hing-Yang Yu, and D. C Yeh, "Exploring a photo-acousto-optic effect for noncontacting photoacoustic sensing," Appl. Opt. 53, E47-E50 (2014)

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