DAS: Distributed Acoustic Sensing
NBX-4000 series
Neubrex TGD-OFDR Technology
01
Long Range
Measurement range up to 120 km
02
High Spatial Resolution
Finest spatial resolution of 1 m
03
High Sensitivity
Detection of minute vibrations
Overcoming the Limitations of Conventional DAS with Proprietary Technology
DAS is widely used for infrastructure monitoring and seismic observation.
However, conventional COTDR technology has faced challenges in achieving both long measurement range and high spatial resolution.
Neubrex has developed a DAS interrogator that delivers
long range, high spatial resolution, and high sensitivity through its proprietary technology.
What is DAS?
- Distributed acoustic sensing technology that uses optical fiber as a sensor
- Main methods: COTDR (time domain) vs TGD-OFDR (frequency domain)
Neubrex DAS Technology:
Key Technologies of TGD-OFDR
Features of Neubrex DAS
Max. Distance
120km
with UV coated SMF
Spatial Resolution
1～50m
Optical Output Power
+25dBm
Sampling Rate
Max.25kSps
Dynamic Range
Max.27.5dB
Frequency Range
0.1Hz～10kHz
Sensitivity
10pε/√Hz
Spatial resolution 2m
Conventional Technology vs Neubrex's TGD-OFDR
| Conventional Technology | Neubrex | |
|---|---|---|
| COTDR | Method | TGD-OFDR |
| 5–10m | Finest Spatial Resolution | 1m |
| 40–100km | Max. Measurement Range | 120km |
|
High Noise Limited Applications |
Features |
Long Range High Spatial Resolution High Sensitivity Versatile |
Advantages of Neubrex DAS
- Practical implementation of long-range OFDR, which was difficult with conventional technologies
- Improved S/N ratio enables detection of minute vibrations and strain
- Real-time processing and versatile applications (earthquakes, oil wells, infrastructure, smart cities)
