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DFS is the short form for distributed fibre sensing (or distributed fibre optics sensor). It is the ultra long sensing distance type of fiber optic sensors. Most of the time ordinary optical fiber (single mode fiber) may be used to sense for heat changes in existing infrastructure such as smart nation applications. Distributed Temperature Sensing (DTS) systems are the most commercial available DFS system in the market today. Their typical sensing spatial resolution is 1 meter with 1 degree Celsius accuracy in very ideal conditions. Wealthy end user such as those in oil and gas industry use Distributed Acoustic Sensing (DAS) system for acoustic sensing. In practical use cases, DAS are greatly affected by environment (wind, thunder, etc.) and human activities (machinery alike disturbance, false intrusion, etc.) if present.
Distributed Fibre Sensing (DFS) is an intrinsic sensor that is able to determine parameter(s) at every point along the length of the optical fiber.
Three Light Scattering Processes
The processes in general
Distributed Sensor Type
Distributed acoustic sensing is a type of OTDR.
Advantages of DAS System
Disadvantages of DAS System
Typical Sensing Capabilities ^
Keywords: distributed fibre sensing, phase sensitive optical time domain reflectometry, polarization optical time domain reflectometry, Institute for Infocomm Research, i2r, dfs, sensor, system, PSOTDR, POTDR, DTS, DAS, sensor, security, science, research, singapore
Tags: #DFS #OTDR #OFDR #PSOTDR #POTDR #sensor #i2r #singapore #limjunlong