研究目的
Investigating the highly sensitive magnetic field sensor based on mode coupling effect in a microstructured optical fiber (MOF).
研究成果
The designed magnetic field sensor based on mode coupling effect in MOF achieves high sensitivity and good linearity in the magnetic field measurement range of 25–175.9 Oe. The performance can be further improved by optimizing the structural parameters in MOF.
研究不足
The sensitivity of the magnetic field sensor is not very high, and the relationship between the coupling wavelength and the magnetic field is not linear, which increases the measurement error.
1：Experimental Design and Method Selection:
The study utilized the finite element method (FEM) to theoretically investigate the mode coupling effect in a microstructured optical fiber (MOF) filled with magnetic fluid (MF).
2：Sample Selection and Data Sources:
Magnetic fluid with a refractive index higher than silica was designed to be filled into one cladding air hole in MOF to form a defect core.
3：List of Experimental Equipment and Materials:
The background material of the MOF is silica, and the refractive index of MF is expressed by the Langevin function.
4：Experimental Procedures and Operational Workflow:
The coupling wavelength between fiber core modes and defect core modes was modulated by external magnetic field.
5：Data Analysis Methods:
The sensitivity and figure of merit (FOM) were calculated to evaluate the performance of the sensor.
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