Xiangjie Ma, Liming Zhou, Linghao Cheng, Weimin Liu. Fast and Long-Distance Brillouin Optical Time-Domain Reflectometry Based on Raman Amplification[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170617
- Laser & Optoelectronics Progress
- Vol. 56, Issue 17, 170617 (2019)
Fig. 1. Experimental systems of fast BOTDR based on Raman amplification. (a) Experiment setup; (b) data processing module
Fig. 2. Center frequency as a function of sensing distance after Lorentzian fitting. (a) With Raman amplification; (b) without Raman amplification
Fig. 3. Frequency spectra along fiber. (a) Frequency spectrum of whole fiber; (b) frequency spectrum around 95 km
Fig. 4. Long-distance temperature sensing experiment. (a) Center frequency; (b) center frequency in heated section
Fig. 5. Brillouin center frequency as a function of temperature
Fig. 6. Frequency spectra along fiber under different pulsed optical powers
Fig. 7. Center frequency as a function of sensing distance after Lorentzian fitting under different pulsed optical powers. (a) P=5 mW; (b) P=10 mW; (c) P=15 mW
Fig. 8. Standard deviation along fiber under different pulsed optical powers
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