Refractive index and temperature optical fiber sensor based on thin core S-taper and spherical structure  

作　　者：YANG Fan CAO Ye LI Meiqi JU Hui LI Lijun 

机构地区：[1]School of Electronic and Information,Qingdao University,Qingdao 266071,China [2]College of Electronic Information Engineering,Shandong University of Science and Technology,Qingdao 266590,China

出　　处：《Optoelectronics Letters》2022年第6期321-325,共5页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2013AA014200);the National Natural Science Foundation of China(No.11444001);and the Municipal Natural Science Foundation of Tianjin(No.14JCYBJC16500)。

摘　　要：A Mach-Zehnder interferometer(MZI)for simultaneously measuring refractive index(RI)and temperature is proposed and verified in this paper.The sensor head is composed of thin core fiber(TCF)S-taper structure and spherical structure.By monitoring two interference dips,experimental results show that the RI sensitivities are-70.392 nm/RIU and-60.08 nm/RIU in the RI range of 1.3384—1.3500,respectively.And the temperature sensitivities are 0.05072 nm/℃and 0.0717 nm/℃in the temperature range of 30—70℃,respectively.The simultaneous measurement of the temperature and external RI is demonstrated based on the sensitive matrix.The sensor also has the advantages of low cost,simple structure and high sensitivity.

关 键 词：fiber INTERFEROMETER TAPER 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]