摘要
In this paper,a novel liquid level sensor with ultra-high sensitivity is proposed.The proposed sensor is configured by a sliceshaped composite long period fiber grating(SSC-LPFG).The SSC-LPFG is prepared by polishing two opposite sides of a composite multimode-single-mode-multimode fiber structure using a CO;laser.The method improves the sensitivity of the sensor to external environment.Based on the simulation calculation,a liquid level sensor with a length of 3 mm is designed.The experimental transmission spectrum agrees well with the simulation result.The experimental results show that the sensitivity reaches 7080 pm/mm in the liquid level range of 0-1400 μm in water.The temperature sensitivity is24.52 pm/℃ in the range of 20℃-90℃.Due to the ultra-high sensitivity,good linearity,and compact structure,the SSC-LPFG has potential application in the field of high-Drecision liquid level measurement.
作者
Xiren Jin
Zeju Rui
Zihang Xiang
Chupeng Lu
Shuo Zhang
Xian Xu
Mingyang Lü
Yiwei Ma
Cuiting Sun
Xinghua Yang
Tao Geng
Weimin Sun
Libo Yuan
金夕人;芮泽钜;向子航;卢楚鹏;张硕;徐显;吕明阳;马一巍;孙翠婷;杨兴华;耿涛;孙伟民;苑立波(Key Laboratory of In-fiber Integrated Optics,Ministry of Education,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China;Acoustic Science and Technology Laboratory,College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;Photonics Research Center,Guilin University of Electronics Technology,Guilin 541004,China)
基金
supported by the Joint Research Fund in Astronomy under cooperative agreement between the National Natural Science Foundation of China (NSFC) and Chinese Academy of Sciences (CAS) (Nos. U1831115, U2031132, U1931206, and U2031130)
Natural Science Foundation of Heilongjiang Province (No. ZD2019H003)
Fundamental Research Funds for the Central Universities to the Harbin Engineering University
