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Chip-integrated optical fiber magnetic field sensing system.
Optics Letters
|November 1, 2023
Summary
A new magnetic field sensor uses plastic optical fiber and magnetic fluid for low-cost, reliable detection. This simple system offers a promising solution for magnetic field sensing applications.
Area of Science:
- Optoelectronics
- Materials Science
- Sensor Technology
Background:
- High demand exists for lightweight, low-cost, and simple magnetic field sensing systems.
- Existing systems may be complex or expensive, limiting their widespread application.
Purpose of the Study:
- To demonstrate a novel, integrated magnetic field sensing system using readily available components.
- To explore the use of magnetic fluid and plastic optical fiber for magnetic field detection.
Main Methods:
- Integration of a light source, detector, magnetic fluid (MF), and plastic optical fiber (POF).
- Utilized bifunctional AlGaInP diodes as both light source and detector.
- Magnetic field sensing based on changes in light reflection at the POF/MF interface.
Main Results:
- The integrated sensor reliably detected magnetic fields in the range of 10 to 400 Gauss.
- The system demonstrated effective sensing by leveraging the magnetic field-induced changes in the POF/MF interface's reflection coefficient.
- The AlGaInP diodes functioned effectively as both light emitters and detectors due to spectral overlap.
Conclusions:
- The developed chip-integrated plastic optical fiber magnetic field sensor is a promising technology.
- The system's lightweight, low-cost, and simple design makes it suitable for various magnetic field sensing applications.
