Distributed optical fiber sensing with Brillouin Optical Time Domain Reflectometry based on differential pulse pair
Optics & Laser Technology（2018）
Abstract
•The proposed a BOTDR system with differential technique is proposed.•The system can achieve sub-meter level spatial resolution over 3 km testing fiber.•The spatial resolution is mainly decided by pulse-width difference.•The rise/fall time of probe pulse pair also affects the spatial resolution.
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Key words
Optical fiber sensing,Brillouin spectrum,Differential pulse pair
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