Where Every Fibre Optic Cable Becomes a Sensor

About Geofib

GeoFib is an advanced system that transforms ordinary fiber optic cables into super-sensitive sensors. Instead of traditional, spread-out point sensors, GeoFib lets you monitor long stretches of cable continuously. It’s perfect for detecting subtle changes in the ground or in large structures.

Louise Collins

Primary contact and Co-ordinator

lcollins-at-cp.dias.ie

David Craig

Technical Lead
davcra-at-dias.ie

Chris Bean

Project PI
chris.bean-at-dias.ie

Martin Möllhoff

Data Management
martin-at-dias.ie

Why GeoFib

GeoFib offers unique advantages:

Comprehensive Coverage: Provides continuous measurements across wide areas, minimising data gaps.

Cost-Efficient: Can often use existing fibre infrastructure, reducing the need for new sensor installations.

Early Insight: Detects signs of potential issues such as ground movement or structural stress in advance.

Versatile Applications: Including microseismic detection, earthquake observation, and environmental sensing.

Resilient Operation: Performs reliably even in challenging conditions and is immune to electromagnetic interference.

Instruments

Technical Specifications

ASN OptoDAS L-Band

  • Long range (>150 km) and very low noise
  • High sensitivity with no noise degradation over the first 80 km
  • Spatial resolution equal to the configurable gauge length (2–40 m depending on the fiber length)
  • L-band designed for co-existence with data traffic
  • Server class recording computer (80TB) enabling remote operation and additional RAID storage

ASN OptoDAS L-Band

  • Long range (>150 km) and very low noise
  • High sensitivity with no noise degradation over the first 80 km
  • Spatial resolution equal to the configurable gauge length (2–40 m depending on the fiber length)
  • L-band designed for co-existence with data traffic
  • Server class recording computer (80TB) enabling remote operation and additional RAID storage
Technical Specifications

Febus A1 v2

  • Range 70 km with gauge length 1–10 m, 80 km with gauge length 20 m
  • 2 optical channels to sense 2 fibres at the same time (max range 140–160 km depending on gauge length)
  • Gauge length is tunable from 1–20 m
  • Acquisition frequency up to 400 kHz
  • 100TB RAID storage
Technical Specifications

Febus A1 v2

  • Range 70 km with gauge length 1–10 m, 80 km with gauge length 20 m
  • 2 optical channels to sense 2 fibres at the same time (max range 140–160 km depending on gauge length)
  • Gauge length is tunable from 1–20 m
  • Acquisition frequency up to 400 kHz
  • 100TB RAID storage
Technical Specifications