Distributed Fiber Temperature System (DTS)

A distributed fiber optic temperature sensing system based on Raman scattering is an advanced technology that enables real-time, spatially resolved temperature measurement along standard telecommunication fibers. Commonly referred to as Distributed Temperature Sensing (DTS), this system provides highly accurate and continuous thermal monitoring in diverse environments such as industrial facilities, power cables, and pipelines.

The fundamental principle relies on Raman scattering, where incident laser pulses interact with molecular vibrations in the fiber’s silica core. This interaction produces two types of backscattered light: Stokes and anti-Stokes components, whose intensity ratio is directly dependent on the local temperature at each point along the fiber.

By analyzing the temporal profile and intensity of the backscattered Raman signals, the system reconstructs the temperature distribution with high spatial resolution. External temperature changes induce variations in the anti-Stokes signal, allowing the DTS system to precisely detect and map thermal events, monitor hotspots, and ensure safe operation across extensive infrastructures.