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Title: Active wavefront shaping for controlling and improving multimode fiber sensor
Authors: Zhong, TT 
Yu, ZP 
Li, HH 
Li, ZH 
Li, HH
Lai, PX 
Issue Date: 2019
Source: Journal of innovative optical health sciences, July 2019, v. 12, no. 4, 1942007, p. 1-9
Abstract: Wavefront shaping (WFS) techniques have been used as a powerful tool to control light propagation in complex media, including multimode fibers. In this paper, we propose a new application of WFS for multimode fiber-based sensors. The use of a single multimode fiber alone, without any special fabrication, as a sensor based on the light intensity variations is not an easy task. The twist effect on multimode fiber is used as an example herein. Experimental results show that light intensity through the multimode fiber shows no direct relationship with the twist angle, but the correlation coefficient (CC) of speckle patterns does. Moreover, if WFS is applied to transform the spatially seemingly random light pattern at the exit of the multimode fiber into an optical focus. The focal pattern correlation and intensity both can serve to gauge the twist angle, with doubled measurement range and allowance of using a fast point detector to provide the feedback. With further development, WFS may find potentials to facilitate the development of multimode fiber-based sensors in a variety of scenarios.
Keywords: Multimode fiber
Wavefront shaping
Scattering media
Fiber sensor
Optical focusing
Publisher: World Scientific
Journal: Journal of innovative optical health sciences 
ISSN: 1793-5458
DOI: 10.1142/S1793545819420070
Rights: © The Author(s)
This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC-BY) License ( Further distribution of this work is permitted, provided the original work is properly cited.
The following publication Zhong, T. T., Yu, Z. P., Li, H. H., Li, Z. H., Li, H. H., & Lai, P. X. (2019). Active wavefront shaping for controlling and improving multimode fiber sensor. Journal of Innovative Optical Health Sciences, 12(4), 1942007, 1-9 is available at
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