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DISTRIBUTED ACOUSTIC SENSING IN A MULTIMODE OPTICAL FIBER USING DISTRIBUTED MODE COUPLING AND DELAY
DISTRIBUTED ACOUSTIC SENSING IN A MULTIMODE OPTICAL FIBER USING DISTRIBUTED MODE COUPLING AND DELAY
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机译:多模光纤中基于分布模式耦合和延迟的分布式声学传感
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摘要
A system and method are provided for distributed acoustic sensing in a multimode optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multimode optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multimode optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multimode optical fiber and detecting an environmental perturbation in the multimode optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multimode optical fiber.
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