Zhuang CHANG, Yi JIANG. Multi-channel Optical Fiber EFPI Absolute Cavity Length Measurement System Based on FPGA Control and White-light Interference Technology[J]. Acta Photonica Sinica, 2022, 51(11): 1106004
- Acta Photonica Sinica
- Vol. 51, Issue 11, 1106004 (2022)
Fig. 1. Schematic diagram of a WLI-based demodulation system
Fig. 2. Signal timing diagram of high-speed white light interferometric demodulation system
Fig. 3. Etalon signal
Fig. 4. Etalon signal
Fig. 5. The structure of the EFPI sensor
Fig. 6. Variation of trough wavelength value
Fig. 7. EFPI sensor's initial cavity length measured at room temperature
Fig. 8. Measured cavity length after changing the initial cavity length by EFPI
Fig. 9. Vibration test platform
Fig. 10. Vibration signal measurement results
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