While both Raman and Brillouin distributed temperature sensors have been in the commercial stream for over a decade, Raman DTS is by far the most prevalent today due to its inherent insensitivity to strain, relegating Brillouin more as a distributed strain sensor in known thermal environments. Measures to compensate Brillouin cross-sensitivity to temperature and strain through signal processing or operating on special sensing fibers have had limited success in unlocking the significant advantages of Brillouin in power, reach, and resolution over Raman DTS.
QOREX has developed a proprietary (patent pending) method of accurate discrimination of temperature and strain in Brillouin OTDR sensors, enabling accurate bi-modal temperature and strain measurement on standard single mode sensing fibers.
This technology will be especially useful in a range of applications that benefit from the distinct advantages Brillouin technology offers. As a frequency-encoded measurement rather than intensity of Raman technology, Brillouin measurements are inherently insensitive to hydrogen-induced measurement error that severely impact Raman systems, that require complicated measurement protocols and dual-ended configurations to compensate these errors. Furthermore, the significant power advantage of Brillouin positions it to address a number of long reach applications such as pipeline, power distribution, and long subsea tie-back oil and gas systems.
However the untapped advantage of the QOREX solution in simultaneous temperature/strain monitoring will fuel its adoption not only in legacy DTS applications, but will address new applications for enhanced measurement resolution and event monitoring. The QOREX solution will also better serve the growing application of Brillouin strain sensors in infrastructure monitoring.
Please contact QOREX directly for more details on QOREX DTSS technology.
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