Temperature-insensitive intensity-modulation liquid refractive index sensor based on fiber-optic Michelson probe structure
| Autor: | Chen Zheng, Xiaozhan Yang, Lian Wang, Guojia Huang, Wenlin Feng, Bang-Xing Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Optical fiber business.industry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention 010309 optics Optics law Fiber optic sensor 0103 physical sciences Physical and Theoretical Chemistry 0210 nano-technology business Intensity modulation Refractive index Mathematical Physics |
| Zdroj: | Zeitschrift für Naturforschung A. 76:653-659 |
| ISSN: | 1865-7109 0932-0784 |
| DOI: | 10.1515/zna-2021-0094 |
| Popis: | A novel liquid refractive index sensor based on the connected single-mode fiber (SMF), no-core fiber (NCF), four-core fiber (FCF), and silver mirror (SM) to form an SMF–NCF–FCF–SM Michelson probe structure is proposed and fabricated. The change of light field in the probe structure has been simulated by the light-beam propagation method. The theoretical results show that light is excited in the NCF and couples into the cores and cladding of FCF at the junction of NCF and FCF. The interference fringes are generated between the cladding modes and core modes of FCF. The sensitivities of the probe in NaCl, sucrose, and glycerol are 171.75 dB/RIU, 121.41 dB/RIU, and 207.50 dB/RIU, respectively. The temperature sensitivity is 0.05 nm/°C, and the intensity change of temperature (≤0.046 dB/°C) is very small and has little effect on the liquid refractive index. Thus, the cross-sensitivity of temperature for the liquid refractive index can be removed. The proposed probe structure has the advantages of easy fabrication, good stability, and linear response, having potential application in the liquid refractive index monitoring environments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|