2D-Vector Magnetic Sensing Based on Ring-Shaped Fiber-Optic Structure Coated with Magnetic Fluid

Area of Science:

• Photonics and Nanotechnology
• Magnetism and Materials Science

Background:

• Fiber-optic sensors offer remote and precise measurement capabilities.
• Magnetic field sensing is crucial for various technological applications, including navigation and power systems.
• Developing high-sensitivity, 2D vector magnetic field sensors remains an active area of research.

Purpose of the Study:

• To explore a novel fiber-optic sensor for 2D magnetic sensing.
• To investigate the use of nanostructured magnetic fluid for enhanced magneto-optical characteristics.
• To analyze the sensor's performance and sensitivity.

Main Methods:

• Fabrication of a fiber-optic sensor with a ring-shaped fiber structure coated in magnetic fluid.
• Utilizing the 3D Monte Carlo method to analyze magneto-optical characteristics induced by nanostructure changes.
• Implementing intensity demodulation for 2D vector magnetic sensing.

Main Results:

• The nanostructured magnetic fluid endows the fiber-optic structure with the ability to detect magnetic fields.
• The sensor successfully achieves 2D vector magnetic sensing.
• A high sensitivity of 2.402 dB/mT was demonstrated.

Conclusions:

• The proposed fiber-optic sensor based on nanostructured magnetic fluid is effective for high-sensitivity 2D magnetic field detection.
• This sensor technology holds significant potential for applications in navigation, electrical power systems, and biological detection.
• The study highlights the advantages of integrating nanostructured magnetic fluids with fiber-optic sensing platforms.