Acoustic Sensing is a technology and method that involves the use of specialized sensors or transducers to detect and convert acoustic (sound) signals into electrical or digital signals for analysis, measurement, or monitoring purposes. Acoustic sensors are designed to capture and process sound waves in a variety of applications, ranging from environmental monitoring to industrial automation and consumer electronics

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Vibration Detection and Localization using Modified Digital Coherent Telecom Transponders

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We demonstrate a vibration detection and localization scheme based on bidirectional transmission of telecom signals with digital coherent detection at the receivers. Optical phase is extracted from the digital signal processing blocks of the coherent receiver, from which the vibration component is extracted by bandpass filtering, and the position along the cable closest to the vibration’s epicenter is recovered by correlation. We demonstrate our scheme first using offline experiment with 200-Gb/s DP-16QAM, and we report field trial results over installed fiber to detect real-world vibration events.

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