作者
Yan Liu, Puxiang Lai, Cheng Ma, Xiao Xu, Yuta Suzuki, Alexander A Grabar, Lihong V Wang
发表日期
2014/3/3
研讨会论文
Photons Plus Ultrasound: Imaging and Sensing 2014
卷号
8943
页码范围
467-472
出版商
SPIE
简介
Time-reversed ultrasonically encoded (TRUE) optical focusing is an emerging technique that focuses light deep into scattering media by phase-conjugating ultrasonically encoded diffuse light. In previous work, the speed of TRUE focusing was limited to no faster than 1 Hz by the response time of the photorefractive phase conjugate mirror, or the data acquisition and streaming speed of the digital camera; photorefractive-crystal-based TRUE focusing was also limited to the visible spectral range. These time-consuming schemes prevent this technique from being applied in vivo, since living biological tissue has a speckle decorrelation time on the order of a millisecond. In this work, using a Tedoped Sn2P2S6 photorefractive crystal at a near-infrared wavelength of 793 nm, we achieved TRUE focusing inside dynamic scattering media having a speckle decorrelation time as short as 7.7 ms. As the achieved speed …
学术搜索中的文章
Y Liu, P Lai, C Ma, X Xu, Y Suzuki, AA Grabar… - Photons Plus Ultrasound: Imaging and Sensing 2014, 2014