研究目的
Investigating the use of tri-core photonic crystal fiber for simultaneous sensing of salinity and temperature in water substances.
研究成果
The proposed tri-core PCF sensor demonstrates high sensitivity for simultaneous measurement of salinity and temperature in seawater, with salinity sensitivities of 5404.9 nm/RIU for x polarization and 5674 nm/RIU for y polarization, and a temperature sensitivity of 4 nm/°C. The sensor shows good linearity in the measurement range and potential for further optimization.
研究不足
The temperature detection range is limited to 0°C to 65°C, which is significantly lower than the melting point of silica. The study suggests that sensitivity can be further improved by optimizing the structural parameters of the proposed tri-core PCF.
1：Experimental Design and Method Selection:
The study employs a tri-core photonic crystal fiber (PCF) for sensing salinity and temperature, utilizing the finite element method for analysis. The sensing mechanism is based on the coupling between silica substrate and analyte material.
2：Sample Selection and Data Sources:
Seawater samples with various salinity concentrations (0% to 80%) and temperatures (25°C to 65°C) are used.
3：List of Experimental Equipment and Materials:
Tri-core PCF sensor, fused silica as the background material, and seawater samples.
4：Experimental Procedures and Operational Workflow:
The PCF sensor is designed with specific air hole diameters to induce birefringence. Seawater samples are infiltrated into the hollow cavities, and the coupling action between silica and analyte modes is analyzed for both x and y polarizations.
5：Data Analysis Methods:
The sensitivity is calculated by tracking wavelength shifts in response to changes in salinity and temperature, using confinement loss spectra and transmission spectra.
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