Temperature Drift Error Correction of F-P Filter Based on Attention Mechanism and LSTM Network

Fig. 4. Temperature measurement result and absolute wavelength drift of FBGs under heating-cooling-heating temperature variation environment. (a) Filter surface temperature; (b) absolute wavelength drift of three sensing FBGs

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Fig. 5. Error correction results of FBG3

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Fig. 6. Error compensation results of FBG1 and FBG2. (a) FBG1; (b) FBG2

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Fig. 7. Temperature measurement result and absolute wavelength drift of FBGs under monotone cooling environment. (a) Filter surface temperature; (b) absolute wavelength drift of three sensing FBGs

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Fig. 8. Wavelength compensation results of different models under monotone cooling environment. (a) LSSVM; (b) RNN; (c) LSTM; (d) Attention-LSTM

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Table 1. Characteristic wavelengths of FBG
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Table 1. Characteristic wavelengths of FBG
FBG FBG0 FBG1 FBG2 FBG3
Wavelength /nm 1528.8393 1541.0621 1557.3460 1562.1832

Table 2. Comparison of temperature drift compensation errors for different FBGs
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Table 2. Comparison of temperature drift compensation errors for different FBGs
FBG FBG1 FBG2 FBG3
LSTM Attention-LSTM LSTM Attention-LSTM LSTM Attention-LSTM
MAE /pm 4.52 1.39 5.25 2.50 3.77 1.46
RMSE /pm 5.81 1.76 6.85 3.01 5.10 1.93
MAXE /pm 11.67 4.97 16.39 6.75 16.64 6.75

Table 3. Results of various models under monotone cooling environment
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Table 3. Results of various models under monotone cooling environment
Model LSSVM RNN LSTM Attention-LSTM
MAE /pm 5.73 8.92 4.23 2.07
RMSE /pm 8.09 9.48 7.67 2.62
MAXE /pm 31.54 21.71 14.09 5.39

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Wenjuan Sheng, Jun Hu, Gangding Peng. Temperature Drift Error Correction of F-P Filter Based on Attention Mechanism and LSTM Network[J]. Acta Optica Sinica, 2023, 43(22): 2205001

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