Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
737193 | Sensors and Actuators A: Physical | 2014 | 5 Pages |
•An optical fiber magnetic field sensor was constructed by incorporating magnetic fluid and a core–cladding–mode interferometer.•The sensing performances of the sensors are controllable by designing the parameters of the asymmetric-tapered structure.•The sensitivity of sensor with axial offset of 168 μm and taper waist diameter is ∼162.06 pm/mT ranging from 0 to 21.4 mT.
We report an optical fiber magnetic field sensor by merging the advantages of magnetic fluid and a core–cladding–mode interferometer which is directly fabricated on a standard single-mode fiber by using an arc fusion splicing machine. The sensing performances of the sensors are controllable by designing the parameters of the asymmetric-tapered structure. Experimental results show that the sensor with axial offset of 168 μm and taper waist diameter of 45 μm not only has good optical properties but also a relatively high magnetic-field sensitivity of ∼162.06 pm/mT ranging from 0 to 21.4 mT. The proposed sensors would find potential applications in weak magnetic sensing fields.