Fiber Bragg Grating (FBG) is a sensitive optical microstructure just a few millimeters long, integrated into a standard single-mode fiber.
Distributed Acoustic Sensing (DAS) relies on Rayleigh backscatter, which interacts with the optical fiber exposed by acoustic waves.
Almost no maintenance. Cable lifetime >20 years
No electrical power at the measurement point
Remote monitoring (50 km and more)
At sensing point Insensitive lead in to reduce disturbances
Resistant to corrosion, lightning, etc.
A Distributed Acoustic Sensing (DAS) is a microstructure with a few millimeters in length.
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