Open AccessDelivering targeted color light through a multimode fiber by field synthesis
Author(s) -
Daixuan Wu,
Liangxia Qin,
Jiawei Luo,
Zeyang Liao,
Xiaoming Chen,
HsiangChen Chui,
Yuecheng Shen
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.396184
Subject(s) - optics , spatial light modulator , monochromatic color , multi mode optical fiber , computer science , pixel , wavefront , light field , colored , focus (optics) , rgb color model , artificial intelligence , computer vision , physics , optical fiber , materials science , composite material
Recent developments of wavefront shaping make the multimode fiber (MMF) as a promising tool to deliver images in endoscopy. However, previous studies using the MMF were limited to monochromatic light or polychromatic light with narrow bandwidth. The desires for colored imaging stimulate us to deliver multi-wavelength light that covers the entire visible spectrum through the MMF. In this work, we demonstrated delivering targeted color light through the MMF by mixing three primary colors (red, green, and blue) with a single spatial light modulator. The optimum phase map that considers all three colors was generated through field synthesis (FS), which requires every pixel of the SLM to partially account for all colors. With both theoretical and numerical approaches, we showed that FS exhibited much better performance than the previously developed spatial segmentation method that employs different pixels to represent different colors. Moreover, by computationally adjusting the compositions of the weight for each color, the colors of the delivered focus can be switched at video framerate. We anticipate that our work paves a way for future applications of delivering color images through the MMF in endoscopy.