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- W2778768574 abstract "Coherent optical time-domain reflectometer (COTDR) has shown high sensing resolution, but it is sensitive to noise, polarization and frequency shift. Wavelet smoothing DSP (Digital Signal Processing), combined with direct-detecting method and precise optical frequency shift controlled by microwave electro-optical modulation, is proposed for improving the performance of COTDR. A resolution of 0.1°C can be obtained in a 4.5-km-long fiber and a 25-km-long fiber. Besides that, the signals' correlation keeps longer than 10 minutes in the 4.5-km-long fiber." @default.
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- W2778768574 date "2017-05-01" @default.
- W2778768574 modified "2023-09-25" @default.
- W2778768574 title "A direct-detecting COTDR based on wavelet smoothing DSP technique" @default.
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- W2778768574 doi "https://doi.org/10.1109/iccsn.2017.8230208" @default.
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