Fig. 1. (a) Schematic view of the designed fiber acoustic and magnetic sensor and (b) its front view.

Fig. 2. Schematic of the test system.

Fig. 3. Simultaneous acoustic and magnetic signals in the frequency domain.

Fig. 4. Acoustic frequency response of the sensor.

Fig. 5. (a) Measured resonant frequency shift of the fiber laser for various applied magnetic field magnitudes. (b) Directivity of this sensor.