Yinggang LIU, Fei LI, Yubo YUAN, Rui LI, Rui ZHOU, Xinyi XU. FBG Wavelength Demodulation Method Based on Support Vector Regression Optimized by Sparrow Search Algorithm[J]. Acta Photonica Sinica, 2025, 54(1): 0106001
- Acta Photonica Sinica
- Vol. 54, Issue 1, 0106001 (2025)
Fig. 1. SSA-SVR algorithm model flow
Fig. 2. Diagram of FBG wavelength demodulation system based on tunable F-P filters
Fig. 3. Variation of F-P transmission wavelength driven by sawtooth wave with different frequencies
Fig. 4. FFP-TF surface temperature change
Fig. 5. Variation of F-P transmission wavelength in the range of 5~8 V
Fig. 6. Schematic of SVR model with window sliding update
Fig. 7. Compensation values and absolute errors for different algorithmic models
Fig. 8. Compensation results of different algorithm models
Fig. 9. Comparison of results of several different demodulation methods
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Table 1. Evaluation metrics for training results of different algorithmic models（frequency is 2.5 Hz）
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Table 2. Error analysis of prediction results of four algorithmic models（frequency is 0.5 Hz）
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