DAS is a fiber-optic sensing technology that transforms standard optical fibers into dense arrays of virtual microphones. It operates by launching coherent laser pulses into the fiber and analyzing the Rayleigh backscattered light. By upscaling the dimension of collected data, distributed sensors are essential in enabling large-scale data acquisition for “big data” systems, and optical fibers offer a unique, highly effective platform for distributed sensing. This technology is revolutionizing industries from infrastructure monitoring. Fiber-optic sensors (also called optical fiber sensors) are fiber -based optical sensors for some quantity, typically temperature or mechanical strain, but sometimes also displacements, vibrations, pressure, acceleration, rotations (measured with optical gyroscopes based on the Sagnac effect), or.
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