Design and synthesis of a packaging polymer enhancing the sensitivity of fiber grating pressure sensor

• Published in: Progress in natural science Vol. 18; no. 2; pp. 197 - 200
• Main Authors: Wen, Qingzhen, Zhu, Jinhua, Gong, Shenguang, Huang, Junbin, Gu, Hongcan, Zhao, Peizhong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2008; Naval University of Engineering, Wuhan 430033, China
• Subjects: Fiber Bragg grating; Packaging polymer; Poisson’s ratio; The sensitivity of fiber grating pressure sensor; Young’s modulus; 包装聚合物; 敏感度; Young’s modulus; The sensitivity of fiber grating pressure sensor; Poisson’s ratio; Fiber Bragg grating; Packaging polymer; Young's modulus; Poisson's ratio
• ISSN: 1002-0071
• DOI: 10.1016/j.pnsc.2007.06.007

A packaging polymer （PP-1） that can enhance the sensitivity of fiber Bragg grating （FBG） pressure sensor was designed and synthesized from hydroxyl terminated polypropylene oxide oligomers, toluene diisocyanate （TDI）, 1,4-butandiol as chain extender, catalyzer, foam agent and foam stabilizer. The testing results show that the Young＇s modulus, Poisson＇s ratio of the packaging polymer are 9.0×10^6N m^-2 and 0.49, respectively. The static pressure sensitivity of fiber optical Bragg gratings packaged by PP-1 was discussed. The theoretical pressure sensitivity of FBG packaged with the polymer cylinder is -1.73×10^-3 MPa^-1, which is 896 times of that of the bare FBG （-1.93×10^-6 MPa^-1）. And its measured pressure sensitivity is -1.10×10^-3 MPa^-1, which is 558 times of that of the bare FBG.