Skip to Main content Skip to Navigation
Journal articles

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

Abstract : 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 photoacous-tic 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.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01974520
Contributor : Thomas Chaigne <>
Submitted on : Thursday, December 10, 2020 - 9:50:57 PM
Last modification on : Thursday, December 17, 2020 - 3:32:31 AM

File

1310.7535.pdf
Files produced by the author(s)

Identifiers

Citation

Thomas Chaigne, Ori Katz, Jérôme Gateau, Claude Boccara, Sylvain Gigan, et al.. Improving photoacoustic-guided optical focusing in scattering media by spectrally filtered detection. Optics Letters, Optical Society of America - OSA Publishing, 2014, 39 (20), pp.6054. ⟨10.1364/ol.39.006054⟩. ⟨hal-01974520⟩

Share

Metrics

Record views

28

Files downloads

11