High frequency optoacoustic arrays using etalon detection

  title={High frequency optoacoustic arrays using etalon detection},
  author={J. D. Hamilton and Takashi Buma and M. Spisar and Michael O'Donnell},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
Two-dimensional phased arrays for high frequency (>30 MHz) ultrasonic imaging are difficult to construct using conventional piezoelectric technology. A promising alternative involves optical detection of ultrasound, where the array element size is defined by the focal spot of a laser beam. Element size and spacing on the order of a few microns are easily achieved, suitable for imaging at frequencies exceeding 100 MHz. We have previously shown images made from a receive-only, two-dimensional… CONTINUE READING
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