Abstract
Acoustic line detectors have been shown to be capable of providing accurate signals for three-dimensional photoacoustic tomography. Free and guided beam optical Mach-Zehnder interferometers (MZI) have been used as well as a waveguide Fabry-Perot interferometer (FPI). The ultimate sensitivity is expected from a FPI where the optical field in the resonator propagates in the acoustic coupling medium (water) surrounding the imaged object. Such a free-beam FPI is completely optically and acoustically transparent, while providing a higher sensitivity compared to the MZI due to the multiple beam interference. In this work the performance of a FPI for measurement of ultrasound waves is compared to a MZI. It is shown that an at least 4.5-fold higher signal to noise ratio is achieved compared to a MZI. The resolution of the FPI is simulated and measured, showing a constant diameter of the interferometer beam. Verification of the stability of the free beam FPI over longer time periods is demonstrated by acquiring a two-dimensional tomography image of a phantom. The sensitivity and stability of the setup makes it suitable for tomographic imaging.
© 2013 SPIE
PDF ArticleMore Like This
H. Grün, G. Paltauf, M. Haltmeier, and P. Burgholzer
6631_6 European Conference on Biomedical Optics (ECBO) 2007
Dylan M. Marques, Oliver Sheppard, Edward Z. Zhang, Paul C. Beard, Peter R. T. Munro, and James A. Guggenheim
126310U European Conference on Biomedical Optics (ECBO) 2023
Jarkko Antila, Jussi Mäkynen, Anna Rissanen, Antti Näsilä, Marko Kaarre, and Heikki Saari
AM1B.5 Applied Industrial Optics: Spectroscopy, Imaging and Metrology (AIO) 2013