研究目的
To propose a novel micro-structured optical fiber magnetic field sensor based on magnetic fluid filling and analyze its performance using the finite element method (FEM).
研究成果
The proposed micro-structured optical fiber magnetic field sensor demonstrates high sensitivity, with average sensitivities of 960.61 pm/Oe for x-pol mode and 884.85 pm/Oe for y-pol mode. The sensor's design allows for competitive performance in magnetic field sensing applications, with potential advantages in size and sensitivity.
研究不足
The study is limited to numerical simulation using FEM, and actual experimental validation is not presented. The performance under varying environmental conditions and long-term stability are not discussed.
1：Experimental Design and Method Selection:
The sensor design involves reducing the air hole radius in the cladding of the fiber from the inner layer to the outer layer and filling a defect hole with magnetic fluid (MF). The performance is analyzed using FEM.
2：Sample Selection and Data Sources:
The sensor's cross-section features three layers of air holes arranged in a rectangular lattice, with specific diameters for each layer. The defect hole is filled with MF.
3：List of Experimental Equipment and Materials:
The sensor uses silica as the background material, with MF filled into a defect hole. The refractive index of MF changes with the external magnetic field.
4：Experimental Procedures and Operational Workflow:
The sensor's sensitivity is calculated based on the shift of the resonance wavelength and the variable of the magnetic field intensity. The core mode loss is analyzed to determine resonance conditions.
5：Data Analysis Methods:
The sensitivity is defined by the shift of the resonance wavelength per unit change in magnetic field intensity. The loss spectrum and resonance wavelength shifts are analyzed under varying magnetic field intensities.
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