Improving photoacoustic-guided optical focusing in scattering media by spectrally filtered detection

Thomas Chaigne, Jérôme Gateau, Ori Katz, Claude Boccara, Sylvain Gigan, Emmanuel Bossy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


We study the potential of photoacoustic guidance for light focusing through scattering samples via wavefront-shaping and iterative optimization. We experimentally demonstrate that the focusing efficiency on an extended absorber can be improved by iterative optimization of the high frequency components of the broadband photoacoustic signal detected with a spherically focused transducer. We demonstrate more than 12-fold increase in the photoacoustic signal generated by a 30 μm wire using a narrow frequency band around 60 MHz. By monitoring the speckle pattern evolution during the optimization process with a CCD camera, we experimentally confirm that such optimization leads to a smaller optical focus than what would be obtained by optimizing lower frequencies of the photoacoustic feedback.

Original languageAmerican English
Pages (from-to)6054-6057
Number of pages4
JournalOptics Letters
Issue number20
StatePublished - 15 Oct 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Optical Society of America


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