FIBER OPTIC SENSING
Fiber bragg grating
A Fiber Bragg Grating (FBG) is a microstructure with a few millimeters length within an optical fiber.
Distributed Acoustic Sensing
Distributed Acoustic Sensing (DAS) relies on Rayleigh backscatter, which interacts with the optical fiber, exposed by acoustic waves.
Why Fiber Optics
Almost no maintenance. Cable lifetime >20 years
No electrical power at the measurement point
Remote monitoring (50 km and more)
High sensitivity and accuracy
At sensing point Insensitive lead in to reduce disturbances
Harsh and explosive environments
Resistant to corrosion, lightning, etc.
Immune to EMI
A Fiber Bragg Grating (FBG) is a microstructure with a few millimeters in length.
Fiber Bragg Grating
Vibrations will result in s strain change/wavelength shift of FBGs which are integrated every X meter.
pinpoint perimeter system
A Distributed Acoustic Sensing (DAS) is a microstructure with a few millimeters in length.
Fiber Optic Sensing Specialist.
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