| YANG Fan,CAO Ye,LI Meiqi,JU Hui,LI Lijun.Refractive index and temperature optical fiber sensor based on thin core S-taper and spherical structure[J].Optoelectronics Letters,2022,(6):321-325 |
| Refractive index and temperature optical fiber sensor based on thin core S-taper and spherical structure |
| Author Name | Affiliation | | YANG Fan | School of Electronic and Information, Qingdao University, Qingdao 266071, China | | CAO Ye | School of Electronic and Information, Qingdao University, Qingdao 266071, China | | LI Meiqi | School of Electronic and Information, Qingdao University, Qingdao 266071, China | | JU Hui | School of Electronic and Information, Qingdao University, Qingdao 266071, China | | LI Lijun | College of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China |
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| Abstract: |
| 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 1.338 4—1.350 0, respectively. And the temperature sensitivities are 0.050 72 nm/°C and 0.071 7 nm/°C in the temperature range of 30—70 °C, 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. |
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