CaltechAUTHORS
  A Caltech Library Service

Applying sub-Nyquist sampling in optical time-reversal-based wavefront shaping to boost targeted light transport through opaque scattering media

Shen, Yuecheng and Liu, Yan and Ma, Cheng and Wang, Lihong (2018) Applying sub-Nyquist sampling in optical time-reversal-based wavefront shaping to boost targeted light transport through opaque scattering media. In: Adaptive Optics and Wavefront Control for Biological Systems IV. Proceedings of SPIE. No.10502. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 105020Z. ISBN 9781510614895. http://resolver.caltech.edu/CaltechAUTHORS:20180907-104553129

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20180907-104553129

Abstract

Wavefront shaping techniques are being actively developed to achieve optical focusing through and inside opaque scattering media. These techniques promise to revolutionize biophotonics by enabling deep-tissue non-invasive optical imaging, optogenetics, optical tweezing, and light-based therapy. Among the existing wavefront shaping techniques, optical time-reversal-based techniques determine the optimum wavefront globally based on the principle of time reversal, without the need to perform time-consuming iterations to optimize each mode in sequence. In all previous optical time-reversal-based wavefront shaping experiments, Nyquist sampling criterion was followed so that the scattered light field was well-sampled during wavefront measurement and wavefront reconstruction. In this work, we overturn this conventional practice by demonstrating that a high-quality optical focus can still be achieved even when the scattered light field is under-sampled. Even more strikingly, we show both theoretically and experimentally that the focus achieved by the under-sampling scheme can be one order of magnitude brighter than that achieved by the well-sampling schemes used in previous works, where 3×3 to 5×5 pixels sampled one speckle grain on average. Moreover, since neighboring pixels were uncorrelated in feedback-based wavefront shaping, introducing the concept of sub-Nyquist sampling in time-reversal-based wavefront shaping makes the optimal phase maps obtained using these two different methods consistent. We anticipate that this newly explored under-sampling scheme will transform the understanding of optical time reversal and boost the performance of optical imaging, manipulation, and communication through opaque scattering media.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2287064DOIArticle
ORCID:
AuthorORCID
Shen, Yuecheng0000-0003-1990-8142
Wang, Lihong0000-0001-9783-4383
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers.
Record Number:CaltechAUTHORS:20180907-104553129
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180907-104553129
Official Citation:Yuecheng Shen, Yuecheng Shen, Yan Liu, Yan Liu, Cheng Ma, Cheng Ma, Lihong Wang, Lihong Wang, } "Applying sub-Nyquist sampling in optical time-reversal-based wavefront shaping to boost targeted light transport through opaque scattering media (Conference Presentation)", Proc. SPIE 10502, Adaptive Optics and Wavefront Control for Biological Systems IV, 105020Z (15 March 2018); doi: 10.1117/12.2287064; https://doi.org/10.1117/12.2287064
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89452
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Sep 2018 03:18
Last Modified:08 Sep 2018 03:18

Repository Staff Only: item control page