Qin Liu, Jin Huang, Hao Liang, Linghao Cheng. Coded DPP-BOTDA Sensor Based on Brillouin Gain-Loss Effect[J]. Laser & Optoelectronics Progress, 2023, 60(9): 0928005
- Laser & Optoelectronics Progress
- Vol. 60, Issue 9, 0928005 (2023)
Fig. 1. Diagram of DPP-BOTDA based on gain and loss
Fig. 2. Pulse sequence amplified by EDFA
Fig. 3. 32-bit Golay code. (a) Cross-correlation result; (b) decoding result
Fig. 4. Coding gain of the Simplex code as a function of code length
Fig. 5. Diagram of gain-loss DPP-BOTDA system
Fig. 6. Experimental results. (a) Amplification of EDFA for different code length sequences; (b) time-domain signal at the end of the fiber for different code length sequences
Fig. 7. Brillouin spectrum obtained with different probing pulses
Fig. 8. Experimental results. (a) Time-domain signal of the heated segment for utilizing 32-bit Simplex pulse sequences at different temperatures; (b) Brillouin spectrum varies with temperature
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