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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3441–3444

Continuous scanning of a time-reversed ultrasonically encoded optical focus by reflection-mode digital phase conjugation

Yuta Suzuki, Jian Wei Tay, Qiang Yang, and Lihong V. Wang  »View Author Affiliations

Optics Letters, Vol. 39, Issue 12, pp. 3441-3444 (2014)

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Time-reversed ultrasonically encoded (TRUE) optical focusing in turbid media was previously implemented using both analog and digital phase conjugation. The digital approach, in addition to its large energy gain, can improve the focal intensity and resolution by iterative focusing. However, performing iterative focusing at each focal position can be time-consuming. Here, we show that by gradually moving the focal position, the TRUE focal intensity is improved, as in iterative focusing at a fixed position, and can be continuously scanned to image fluorescent targets in a shorter time. In addition, our setup is, to the best of our knowledge, the first demonstration of TRUE focusing using a digital phase conjugate mirror in a reflection mode, which is more suitable for practical applications.

© 2014 Optical Society of America

OCIS Codes
(070.5040) Fourier optics and signal processing : Phase conjugation
(110.7050) Imaging systems : Turbid media
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(110.0113) Imaging systems : Imaging through turbid media

ToC Category:
Imaging Systems

Original Manuscript: December 12, 2013
Revised Manuscript: April 7, 2014
Manuscript Accepted: April 25, 2014
Published: June 4, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Yuta Suzuki, Jian Wei Tay, Qiang Yang, and Lihong V. Wang, "Continuous scanning of a time-reversed ultrasonically encoded optical focus by reflection-mode digital phase conjugation," Opt. Lett. 39, 3441-3444 (2014)

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