(Peer-Reviewed) Highly sensitive and fast response strain sensor based on evanescently coupled micro/nanofibers
Wen Yu 余文 ¹, Ni Yao ², Jing Pan 潘婧 ¹, Wei Fang 方伟 ¹, Xiong Li ³, Limin Tong 童利民 ¹, Lei Zhang 张磊 ¹ ²
¹ State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
中国 杭州 浙江大学 光电科学与工程学院 现代光学仪器国家重点实验室
² Research Center for Intelligent Sensing, Zhejiang Lab, Hangzhou 311121, China
中国 杭州 之江实验室智 智能感知研究院
³ Tencent Robotics X Lab, Tencent Technology (Shenzhen) Co. Ltd, Shenzhen 518054, China
中国 深圳 腾讯科技（深圳）有限公司 腾讯Robotics X实验室
Opto-Electronic Advances, 2022-07-15
Abstract
Flexible strain sensors play an important role in electronic skins, wearable medical devices, and advanced robots. Herein, a highly sensitive and fast response optical strain sensor with two evanescently coupled optical micro/nanofibers (MNFs) embedded in a polydimethylsiloxane (PDMS) film is proposed. The strain sensor exhibits a gauge factor as high as 64.5 for strain ≤ 0.5% and a strain resolution of 0.0012% which corresponds to elongation of 120 nm on a 1 cm long device.
As a proof-of-concept, highly sensitive fingertip pulse measurement is realized. The properties of fast temporal frequency response up to 30 kHz and a pressure sensitivity of 102 kPa−1 enable the sensor for sound detection. Such versatile sensor could be of great use in physiological signal monitoring, voice recognition and micro-displacement detection.
Separation and identification of mixed signal for distributed acoustic sensor using deep learning
Huaxin Gu, Jingming Zhang, Xingwei Chen, Feihong Yu, Deyu Xu, Shuaiqi Liu, Weihao Lin, Xiaobing Shi, Zixing Huang, Xiongji Yang, Qingchang Hu, Liyang Shao
Opto-Electronic Advances
2025-11-25
