Yilin GUO, Yihao LI, Binbin LUO, Xue ZOU, Decao WU, Gongye LI, Sheng CAO, Shenghui SHI, Mingfu ZHAO. Design of Self-collimating Fiber FP Cavity and Localization of Sound Source Based on Silver Film[J]. Acta Photonica Sinica, 2024, 53(4): 0406007
- Acta Photonica Sinica
- Vol. 53, Issue 4, 0406007 (2024)
Fig. 1. FP cavity dual beam interference model
Fig. 2. Distribution of light field before and after collimation
Fig. 3. Schematic diagram of fiber optic cutting and sensor structure
Fig. 4. Layout setup of optical fiber sensor array for sound location
Fig. 5. Experimental system diagram
Fig. 6. Time domain and frequency domain diagram of sensor at 70 Hz and 500 Hz
Fig. 7. Comparison of interference fringes and slopes for EFPI with or without collimator
Fig. 8. Comparison diagram of sound pressure response， sound pressure sensitivity and frequency response of EFPI sensor with or without collimator at 500 Hz frequency
Fig. 9. Schematic diagram of sensor array
Fig. 10. Sound press response of the Sensor array at 1 kHz
Fig. 11. Schematic diagram and results of acoustic directivity experiment
Fig. 12. Time-domain waveforms and cross correlation results of the three sensors when the sound source coordinate is （50 cm， 70 cm）.
Fig. 13. Sensor array detection results
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Table 1. Results of sound source location
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Table 2. System performance comparison
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