Single optical microfiber enabled tactile sensor for simultaneous temperature and pressure measurement

• DOI: 10.1364/prj.461182
• Publication Date: 2022-06-30T14:00:09Z
• Authors: Ni Yao; Xiaoyu Wang; Shuqi Ma; Xingda Song; Shan Wang; Zhangxing Shi; Jing Pan; Shipeng Wang; Jianliang Xiao; Haitao Liu; Longteng Yu; Yao Tang; Zhang Zhang; Xiong Li; Wei Fang; Lei Zhang; Limin Tong
• Keywords: Microfiber

The ability to sense heat and touch is essential for healthcare, robotics, human–machine interfaces. By taking advantage of the engineerable waveguiding properties, we design fabricate a flexible optical microfiber sensor simultaneous temperature pressure measurement based on theoretical calculation. exhibits high sensitivity 1.2 nm/°C by measuring shift high-order mode cutoff wavelength in short-wavelength range. In case sensing, shows 4.5% per kilopascal with fast temporal frequency response 1000 Hz owing strong evanescent wave guided outside microfiber. cross talk negligible because signals are measured at different wavelengths mechanisms. properties response, temperature, enable real-time skin wrist pulse measurements, which critical accurate analysis waveforms. We believe will have great potential wearable devices ranging from healthcare humanoid robots.