Fiber Sensing refers to the use of optical fibers as sensors to measure various physical, chemical, or environmental parameters. Optical fibers, typically made of glass or plastic, are capable of carrying light over long distances with minimal signal loss. When these fibers are engineered or modified for sensing purposes, they can detect changes in specific properties and convert them into measurable signals. Fiber sensing has a wide range of applications across different industries due to its unique advantages, including high sensitivity, immunity to electromagnetic interference, and the ability to operate in harsh or remote environments.

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Optical Fiber Sensing Technology Visualizing the Real World via Network Infrastructures – AI technologies for traffic monitoring

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Optical fibers have a sensing function that captures environmental changes around the fiber cable. According to the recent technology evolution of optical transmission and AI, the application of the fiber sensing has expanded and visualization accuracy has improved. We have proposed to monitor the traffic flow on the road using the existing optical fiber infrastructure along the road. In this paper, we propose a traffic flow analysis AI algorithm with high environmental resistance and show the evaluation results of traffic monitoring.

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Static Weight Detection and Localization on Aerial Fiber Cables using Distributed Acoustic Sensing

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We demonstrated for the first time to our knowledge, the detection and localization of a static weight on an aerial cable by using frequency domain decomposition analysis of ambient vibrations detected by a φ-DAS system.

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Field Trial of Abnormal Activity Detection and Threat Level Assessment with Fiber Optic Sensing for Telecom Infrastructure Protection

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We report the field trial results of monitoring abnormal activities near deployed cable with fiber-optic-sensing technology for cable protection. Detection and position determination of abnormal events and evaluating the threat to the cable is realized.

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Field Trial of Vibration Detection and Localization using Coherent Telecom Transponders over 380-km Link

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We demonstrate vibration detection and localization based on extracting optical phase from the DSP elements of a coherent receiver in bidirectional WDM transmission of 200-Gb/s DP-16QAM over 380 km of installed field fiber.

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