Research on magnetic field sensor based on hollow core optical fiber devices
Citation
薛忆谱 (Xue Yipu). (2023). 基于空芯光纤器件的磁场传感器研究 [Research on magnetic field sensor based on hollow core optical fiber devices] (硕士学位论文) [Master's Thesis]. 天津理工大学 [Tianjin University of Technology].
Keywords
- Magnetic fluid (MF)
- Single-mode fiber (SMF)
- U-shaped hollow-core fiber (UHCF)
- SMF-UHCF-SMF fiber structure
- Optical fiber magnetic field sensor
- Magnetic field sensing
- Temperature sensing
- Dual parameter measurement
- Refractive index
- Transmission spectrum
- Sensitivity
- Linearity
- Low cost
- Fusion splicing
- Encapsulation
Brief
This thesis presents the research and design of a simple and low-cost U-bent hollow-core fiber (SMF-UHCF-SMF) magnetic field sensor utilizing the tunable refractive index of magnetic fluid for the simultaneous measurement of magnetic field strength and temperature.
Summary
This thesis details the design, fabrication, and experimental testing of a simple and low-cost U-bent hollow-core fiber (SMF-UHCF-SMF) magnetic field sensor that utilizes the tunable refractive index of magnetic fluid to achieve simultaneous measurement of magnetic field strength and temperature by observing changes in its transmission spectrum. The research explores the sensor's sensitivity to both magnetic fields (achieving a maximum sensitivity of 1.0898 nm/mT) and temperature (with a maximum sensitivity of 0.324 nm/°C), and investigates the influence of the hollow-core fiber's core diameter, length, and the U-bend diameter on the sensor's performance to determine optimal parameters.
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