Qiufeng SHANG, Xueli LI. Extraction Method of Brillouin Gain Spectrum Based on Long Short Term Memory Network[J]. Acta Photonica Sinica, 2023, 52(1): 0106004
- Acta Photonica Sinica
- Vol. 52, Issue 1, 0106004 (2023)
Fig. 1. BOTDA setup for temperature sensing
Fig. 2. The phenomenon of distorted Brillouin gain spectrum
Fig. 3. Single mode fiber SBS model
Fig. 4. Architecture of LSTM model
Fig. 5. BGS with different scanning step
Fig. 6. RMSE at different frequency step
Fig. 7. Distorted BGS along the sensing fiber heated at 55℃
Fig. 8. Corrected BGS along the sensing fiber heated at 55℃
Fig. 9. Tempreture distribution along the 500 m heated fiber from 20 km to 21 km
Fig. 10. RMSE for the 500 m heated fiber at different frequency step
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Table 1. Comparison of processing time using LSTM，ELM and LCF along 40 km fiber
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