Cong WEI, Ci-ming ZHOU, Xi CHEN, Yu-xiao LI, Han-jie LIU, Dian FAN. FBG Demodulation Method Based on Frequency Shift Interference Digital Mixing Algorithm[J]. Acta Photonica Sinica, 2020, 49(12): 34
- Acta Photonica Sinica
- Vol. 49, Issue 12, 34 (2020)
Fig. 1. Modified frequency shift interference structure
Fig. 2. Demodulating principle diagram of digital mixing method in modified FSI system
Fig. 3. Simulation output interference spectrum
Fig. 4. Continuous wavelength demodulation result
Fig. 5. Continuous wavelength demodulation result
Fig. 6. MFSI temperature sensing system
Fig. 7. Demodulation result of digital mixing method
Fig. 8. Temperature experimental demodulation results
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Table 1. Simulation results of Hilbert transformation
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Table 2. Simulation results of digital mixing method
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Table 3. Demodulation of adjacent phase difference by digital mixing method
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Table 4. Logic circuit characteristics of one-hot FSM phase compensation
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