Abstract
A volume grating-based holographic sensor in highly stretchable PVA/AA polymer for sensing its micro-deformation and, hence, the displacement has been studied. One-dimensional micro-displacement induced by tensile stress is analyzed using a diffraction spectrum in two kinds of sensor construction methods, i.e., transmission and reflection. The dependence of the peak wavelength on the displacement presents a good linear relationship which provides a quantitative sensing strategy for hydrogel micro-deformation. The available sensitivity is better than 4 μm/0.5 nm (displacement/wavelength shift) using a commercial spectrometer with a resolution of 0.5 nm. Finally, the reversible deformation response further validates the practical applicability of a holographic sensor constructed by photosensitive hydrogel. The optical measurement of micro-displacement as a novel sensing strategy can accelerate the development of the holographic optical element.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Hongpeng Liu, Rui Wang, Baohua Wang, Li Li, Xinying Jiao, Qinggong Song, and Dan Yu
Appl. Opt. 58(8) 2042-2049 (2019)
Hongpeng Liu, Mingzhao Wei, Li Li, Baohua Wang, Dan Yu, and Weibo Wang
Opt. Lett. 46(6) 1249-1252 (2021)
Dan Yu, Qi Liu, Hongpeng Liu, Suhua Luo, Mingzhao Wei, Li Li, and Weibo Wang
Opt. Lett. 46(18) 4438-4441 (2021)