Zihao Liang, Shecheng Gao, Yuanhua Feng, Weiping Liu. Fast BOTDA Sensing System Based on Coherent Detecting Digital Optical Frequency Comb[J]. Laser & Optoelectronics Progress, 2018, 55(11): 110602
- Laser & Optoelectronics Progress
- Vol. 55, Issue 11, 110602 (2018)
Fig. 1. Schematic of fast BOTDA sensing system
Fig. 2. Power spectrum of DOFC
Fig. 3. Structural diagram of fast BOTDA sensing system based on coherent detecting DOFC
Fig. 4. Original BGS and BPS measured at a position of sensing fiber. (a) BGS; (b) BPS
Fig. 5. Spectral distributions along 10 km sensing fiber. (a) BGS; (b) BPS
Fig. 6. BFS distribution measured by sensing system
Fig. 7. Measurement results. (a) Temperature; (b) strain
Fig. 8. Spectra obtained when heating different positions of 10 km fiber. (a) Front-end; (b) middle-part; (c) back-end
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