Fiber Optic Acoustic Sensing is a method of turning fiber optic cables into distributed microphones that detect vibrations and sound waves. NEC Labs America uses this for seismic monitoring, perimeter security, and infrastructure diagnostics. By combining optical sensing with AI models, researchers create large-scale acoustic monitoring systems that operate continuously without requiring dedicated sensor installations.
We propose a hybrid remote and distributed vibration sensing system based on phase-sensitive optical time-domain reflectometry with collimator-based sensor heads. We demonstrate dual-laser vibrometers that detects nm-scale displacements of remote targets.
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NEC Laboratories America, Inc. (NEC Labs) is the US-based center for NEC Corporation’s global network of corporate research laboratories. Our diverse research groups collaborate with industry, academia and governments to provide disruptive solutions to complex problems. A leader in the integration of IT and network technologies with more than 100 years of expertise, NEC provides a combination of products and solutions that cross-utilize the company’s experience and global resources to meet the complex and ever-changing needs of its customers.