Sarper Özharar

Utilizing Distributed Acoustic Sensing with Telecom Fibers for Entomological Observations

Sarper Özharar, Yue Tian, Yangmin Ding, Zhuocheng Jiang et autres

Brood X cicadas were monitored in situ in our testbed using a DAS system connected to an outdoor telecom fiber over a 16-day period. The spectral and energy characteristics of the cicada calling signal has been measured and analysed.

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End-to-End AI for Distributed Fiber Optics Sensing: Eliminating Intermediate Processing via Raw Data Learning

Zhuocheng Jiang, Yue Tian, Yuheng Chen, Yangmin Ding et autres

For the first time, we present an end-to-end AI framework for data analysis in distributed fiber optic sensing. The proposed model eliminates the need for optical phase computation and outperforms traditional data processing pipelines, achieving over 96% recognition accuracy on a diverse …

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Resilient DFOS placement strategy for power grid monitoring: integrating fiber and power network dependencies

Yangmin Ding, Md Z Islama, Yue Tian, Zhuocheng Jiang et autres

We propose a novel Distributed Fiber Optic Sensing (DFOS) placement strategy tailored to the evolving needs of modern power grids, where fiber cables serve dual purposes: communication and real-time sensing. Our approach integrates a heuristic algorithm, PURE (Power Source-aware Route Exploration), with …

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Detection of waves and sea-surface vessels via time-domain-only analysis of underwater DAS data

Sarper Özharar, Yue Tian, Yangmin Ding, Zhuocheng Jiang et autres

Optical flow processing for chirped-pulse coherent OTDR

Jian Fang, Yaowen Li, Giovanni Milione, Sarper Özharar et autres

We propose a novel optical flow processing technique for distributed temperature and strain sensing with the chirped-pulse coherent OTDR. Unlike conventional 1-dimensional cross-correlation methods, the technique treats the 2-dimensional waterfall data as sequential video frames, estimating local shifts through optical flow. The …

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Free-space optical sensing using vector beam spectra

Giovanni Milione, Sarper Özharar, Jian Fang, Philip Nan Ji et autres

Seeing the Vibration from Fiber-Optic Cables: Rain Intensity Monitoring using Deep Frequency Filtering

Zhuocheng Jiang, Yangmin Ding, Junhui Zhao, Yue Tian et autres

The various sensing technologies such as cameras, Li-DAR, radar, and satellites with advanced machine learning models offers a comprehensive approach to environmental perception and understanding. This paper introduces an innovative Distributed Fiber Optic Sensing (DFOS) technology utilizing the existing telecommunication infrastructure networks …

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Fiber Optic Sensing in Rain Detection Using Unsupervised Domain Adaptation

Yangmin Ding, Sai Ying Shi, Yue Tian, Zhuocheng Jiang et autres

Traditional rain detection methods are often constrained by their limited spatial coverage and lack of adaptability in diverse environmental conditions. This gap highlights the need for more advanced, adaptable solutions for rain detection. Recent advances in distributed acoustic sensing (DAS) have shown …

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Distributed Fiber Optic Sensing for Fault Localization Caused by Fallen Tree Using Physics-informed ResNet

Yangmin Ding, Sarper Özharar, Zhuocheng Jiang, Yue Tian et autres

Falling trees or their limbs can cause power lines to break or sag, sometimes resulting in devastating wildfires. Conventional protections such as circuit breakers, overcurrent relays and automatic circuit reclosers may clear short circuits caused by tree contact, but they may not …

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Long-term monitoring and analysis of Brood X cicada activity by distributed fiber optic sensing technology

Sarper Özharar, Jessica L. Ware, Yue Tian, Yangmin Ding

Brood X is the largest of the 15 broods of periodical cicadas, and individuals from this brood emerged across the Eastern United States in spring 2021. Using distributed acoustic sensing (DAS) technology, the activity of Brood X cicadas was monitored in their …

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Utility Polelocalization by Learning from Ambient Traces on Distributed Acoustic Sensing

Zhuocheng Jiang, Yue Tian, Yangmin Ding, Sarper Özharar et autres

Utility pole detection and localization is the most fundamental application in aerial-optic cables using distributed acoustic sensing (DAS). The existing pole localization method recognizes the hammer knock signal on DAS traces by learning from knocking vibration patterns. However, it requires many efforts …

Distributed fiber optic sensing over readily available telecom fiber networks

Sarper Özharar, Yue Tian, Ming-Fang Huang, Philip Nan Ji et autres

Distributed Fiber Optic Sensing (DFOS) systems rely on measuring and analyzing different properties of the backscattered light of an optical pulse propagating along a fiber cable. DFOS systems can measure temperature, strain, vibrations, or acoustic excitations on the fiber cable and to …

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