Microwave Photonic Demodulation Technology for Dense Fiber Bragg Grating Sensor Network

Xiuwen Zhang; Di Zheng; Xihua Zou; Wei Pan

doi:10.3788/AOS230983

Acta Optica Sinica, Volume. 43, Issue 22, 2206002(2023)

Microwave Photonic Demodulation Technology for Dense Fiber Bragg Grating Sensor Network

Xiuwen Zhang, Di Zheng^*, Xihua Zou, and Wei Pan

Center for Information Photonics and Communications, the School of Information Science & Technology, Southwest Jiaotong University, Chengdu 611756, Sichuan , China

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Fig. 1. Schematic of microwave photonic interrogation based on frequency-time domain transformation

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Fig. 2. Schematic of time-domain signal superposition

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Fig. 3. AOA execution flowchart

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Fig. 4. Experimental setup diagram of microwave photonic interrogation system under time-domain signal overlap

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Fig. 5. Frequency spectrum response curve of FBG sensing array

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Fig. 6. Time-domain overlapping spectra under different strains

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Fig. 7. AOA iteration process

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Fig. 8. AOA demodulation result

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Fig. 9. Iterative process of seven meta-heuristic algorithms

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Table 1. Performance comparison of seven meta-heuristic algorithms
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Table 1. Performance comparison of seven meta-heuristic algorithms
Algorithm Demodulation time/s RMSE of FBG₁/με RMSE of FBG₂/με
AOA 5.158 2.406 3.769
GA 5.468 4.317 7.577
PSO 5.562 3.513 5.035
DE 5.381 3.913 8.052
SSA 6.717 3.235 4.488
WOA 5.412 2.904 4.783
CGO 21.677 2.541 3.614

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Xiuwen Zhang, Di Zheng, Xihua Zou, Wei Pan. Microwave Photonic Demodulation Technology for Dense Fiber Bragg Grating Sensor Network[J]. Acta Optica Sinica, 2023, 43(22): 2206002

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