Xi YANG, Huanhuan YIN, Zhihua SHAO, Xueguang QIAO. Ultrasonic Microfiber Sensor Based on Tapered Seven-core Fiber[J]. Acta Photonica Sinica, 2022, 51(3): 0306006
- Acta Photonica Sinica
- Vol. 51, Issue 3, 0306006 (2022)
Fig. 1. The proposed TSCF sensor
Fig. 2. Transmission spectra of the SMF-TSCF-SMF structure with 29 μm diameter taper，19 μm diameter taper and 11 μm diameter taper
Fig. 3. Transmission spectra of TSCF with different diameters before and after entering water
Fig. 4. Schematic diagram of the ultrasonic detection system
Fig. 5. 1 MHz sensor ultrasonic response
Fig. 6. Sensor stability test
Fig. 7. Experimental measurement
Fig. 8. Ultrasonic response of sensor
Fig. 9. Spectrum response characteristics of sensor to pulsed UWs with frequency of 500 kHz and 5 MHz
Fig. 10. Variation of sensor response amplitude with ultrasonic intensity
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