Abstract
In this paper, a highly sensitive dual-core microstructured fiber (DC-MSF) sensor is proposed. Because of the adjustable dispersion characteristic of the DC-MSF, the group refractive index (RI) difference between the <italic>y</italic>-polarization odd and even supermodes could achieve the zero value at the dispersion turning point, which makes the DC-MSF sensor have a high sensitivity. The simulation results show that the sensitivity can be up to 52875 nm/RIU around the RI of 1.4, the operating bandwidth of sensitivity over 104 nm/RIU is 625 nm, and the operating bandwidth of sensitivity over 105 nm/RIU is 100 nm. Moreover, the DC-MSF can also be used as a temperature sensor by coating the polydimethylsiloxane on the surface, and the sensitivity can be up to 23.12 nm/°C around 22 °C. The detectable RI and temperature ranges of the proposed DC-MSF sensor are 1.375-1.425 and -15-95 °C, respectively.
Original language | English |
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Pages (from-to) | 10489-10499 |
Number of pages | 11 |
Journal | IEEE Sensors Journal |
Volume | 23 |
Issue number | 10 |
Early online date | 10 Apr 2023 |
DOIs | |
Publication status | Published - 15 May 2023 |
Keywords
- Dispersion turning point
- In-Line fiber interferometer
- Interference
- Optical fiber couplers
- Optical fiber dispersion
- Optical fiber sensor
- Optical fiber sensors
- Refractive index sensor
- Sensitivity
- Sensors
- Temperature sensor
- Temperature sensors