Sensing Technologies | NBG Customized Fiber Optic Solutions

FIBER OPTIC SENSING

Sensing Technologies

Technologies Overview

Fiber bragg grating

A Fiber Bragg Grating (FBG) is a microstructure with a few millimeters length within an optical fiber.

  • Monitor well defined points
  • Sensors for strain, temperature, tilt, acceleration, displacement, etc.
  • Up to 40 multiplexed sensors per channel
  • Fiber Bragg Grating Technology
  • up to 16 channels on one interrogation unit

Distributed Sensing

Distributed Temperature and Strain Sensing (DTS, DTSS) rely on Raman or Brillouin backscatter technology to detect mechanical forces or temperature changes along the complete length of the fiber.
  • Monitor parameters on the complete length of the fiber
  • Strain and / or temperature
  • Up to 50km with one device
  • Raman and Brillouin sensing technology

Acoustic Sensing

Distributed Acoustic Sensing (DAS) relies on Rayleigh backscatter, which interacts with the optical fiber, exposed by acoustic waves.

  • Monitor acoustic events
  • Detect location with accuracy 1-10m
  • Up to 50 km with one device
  • Rayleigh sensing technology

Why Fiber Optics

Lifetime

Almost no maintenance. Cable lifetime >20 years

Passive Sensor

No electrical power at the measurement point

Long distance

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

Electromagnetic interference

FBG Sensing

Fiber Bragg Grating (FBG) is a sensitive optical microstructure of a few millimeters length which is integrated into a standard single-mode fiber. 

Fiber Bragg Gratings

System

Applications

Case Studies

Canara bridge

GMÜND

DAS Sensing

A Distributed Acoustic Sensing (DAS) is a microstructure with a few millimeters in length.

Comparison

David Laister

Fiber Optic Sensing Specialist.
“Challenge me with your project”

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