Brillouin optical correlation domain reflectometry with temporal gating scheme and apodization scheme

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We experimentally demonstrate a Brillouin optical correlation domain reflectometry system with temporal gating scheme and apodization scheme. Temporal gating onto the pump light is used for expanding the measurement range, and apodization onto the laser spectrum shape is used for reducing background noise to enhance spatial resolution and strain dynamic range. A section with 50 cm length and 7000 μepsilon strain was detected in 1100 m single mode fiber with 29 cm nominal spatial resolution.

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