Distributed Fiber Optics Sensing involves using optical fibers as sensors to collect data along their entire length. Unlike traditional point sensors, distributed sensing allows for continuous and real-time monitoring of physical parameters such as temperature, strain, and vibrations along the entire length of the optical fiber. Various techniques, such as Rayleigh scattering or Raman scattering, are employed to analyze changes in the optical signal and derive information about the surrounding environment.

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Distributed fiber optic sensing over readily available telecom fiber networks

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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 their unique specifications, they have many applications and advantages over competing technologies. In this talk we will focus on the challenges and applications of DFOS systems using outdoor grade telecom fiber networks instead of standard indoor or some specialty fiber cables.

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DAS over 1,007-km Hybrid Link with 10-Tb/s DP-16QAM Co-propagation using Frequency-Diverse Chirped Pulses (OFC)

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We report the first distributed acoustic sensing (DAS) results over>1,000 km on a field-lab hybrid link using chirped-pulses with correlation detection and 20× frequency-diversity, achieving a sensitivity of 100 pa/√Hz at 20-meters spatial resolution.

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Distributed Acoustic Sensing for Datacenter Optical Interconnects using Self-Homodyne Coherent Detection

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We demonstrate distributed acoustic sensing (DAS) over a bidirectional datacenter link which uses self-homodyne coherent detection for the data signal. Frequency multiplexing allows sharing the optoelectronic hardware, and enables DAS as an auxiliary function.

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