High-efficiency time-reversed ultrasonically encoded optical focusing using a large-area photorefractive polymer

Yuta Suzuki; Puxiang Lai; Xiao Xu; Lihong V. Wang

doi:10.1117/12.2005021

4 March 2013 High-efficiency time-reversed ultrasonically encoded optical focusing using a large-area photorefractive polymer

Yuta Suzuki, Puxiang Lai, Xiao Xu, Lihong V. Wang

Author Affiliations +

Proceedings Volume 8581, Photons Plus Ultrasound: Imaging and Sensing 2013; 85811G (2013) https://doi.org/10.1117/12.2005021
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Time-reversed ultrasonically encoded (TRUE) optical focusing focuses light beyond one transport mean free path by phase-conjugating the ultrasonically tagged light. However, in previous works, only a small portion of the tagged light was phase-conjugated by using a photorefractive Bi₁₂SiO₂₀ crystal, due to its small active area (1x1 cm²). In this work, we report high-efficiency TRUE focusing using a large-area photorefractive polymer (5x5 cm²), which demonstrated ~40 times increase in focused energy. Further, we imaged absorbers embedded in a turbid sample of thickness of ~12 transport mean free paths.

Citation Download Citation

Yuta Suzuki, Puxiang Lai, Xiao Xu, and Lihong V. Wang "High-efficiency time-reversed ultrasonically encoded optical focusing using a large-area photorefractive polymer", Proc. SPIE 8581, Photons Plus Ultrasound: Imaging and Sensing 2013, 85811G (4 March 2013); https://doi.org/10.1117/12.2005021

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