A distributed acoustic and temperature sensor using a commercial off-the-shelf DFB laser

Y. Muanenda; C. J. Oton; S. Faralli; T. Nannipieri; A. Signorini; F. Di Pasquale

doi:10.1117/12.2205249

28 September 2015 A distributed acoustic and temperature sensor using a commercial off-the-shelf DFB laser

Y. Muanenda, C. J. Oton, S. Faralli, T. Nannipieri, A. Signorini, F. Di Pasquale

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.

Citation Download Citation

Y. Muanenda, C. J. Oton, S. Faralli, T. Nannipieri, A. Signorini, and 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); https://doi.org/10.1117/12.2205249

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