28 September 2015 A distributed acoustic and temperature sensor using a commercial off-the-shelf DFB laser
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96342C (2015) https://doi.org/10.1117/12.2205249
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
In this paper, we experimentally demonstrate a hybrid distributed acoustic and temperature sensor (DATS) based on Raman and coherent Rayleigh scattering processes in a standard singlemode fiber. A single commercial off-the-shelf DFB laser and a common receiver block are used to implement a highly integrated hybrid sensor system with key industrial applications. Distributed acoustic sensing and Raman temperature measurement are simultaneously performed by exploiting cyclic Simplex pulse coding in a phase-sensitive OTDR and in Raman DTS using direct detection. Suitable control and modulation of the DFB laser ensures inter-pulse incoherence and intra-pulse coherence, enabling accurate long-distance measurement of vibrations and temperature with minimal post-processing.
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Y. Muanenda, Y. Muanenda, C. J. Oton, C. J. Oton, S. Faralli, S. Faralli, T. Nannipieri, T. Nannipieri, A. Signorini, A. Signorini, F. Di Pasquale, F. Di Pasquale, } "A distributed acoustic and temperature sensor using a commercial off-the-shelf DFB laser ", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96342C (28 September 2015); doi: 10.1117/12.2205249; https://doi.org/10.1117/12.2205249
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