KEYWORDS: Signal attenuation, Calibration, Raman spectroscopy, Light sources, Sensors, Fiber lasers, Signal processing, Active remote sensing, Hydrogen, Temperature metrology
Raman-based Distributed Temperature Sensing (DTS) utilizing fiber probes is an effective method to determine
temperature over distances up to 20km. Active Plug & Play is based on a full DTS solution (DTS system with
PerfectVisionTM, Calibration Module, SensorTran DTS Commander software) using a dual laser approach with light
sources operating at different wavelengths to determine and compensate for the wavelength dependent local variations in
fiber attenuation. The wavelength values for the anti-Stokes Raman return of the primary light source is approximately
the same value as the Stokes Raman return of the secondary source. This solution enables the first auto-correcting
calibration for DTS.
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