Brillouin distributed sensor over a 200km fiber-loop using a dual-pump configuration and colour coding

S. Le Floch; F. Sauser; M. Llera; E. Rochat

doi:10.1117/12.2057821

2 June 2014 Brillouin distributed sensor over a 200km fiber-loop using a dual-pump configuration and colour coding

S. Le Floch, F. Sauser, M. Llera, E. Rochat

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91575K (2014) https://doi.org/10.1117/12.2057821
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In this paper, we propose a new Brillouin Optical Time Domain Analysis (BOTDA) set-up that combines simultaneous Brillouin gain/loss measurements with colour coding. This technique gives the advantage that the pump power can greatly be increased, compared to other coding schemes, thus increasing the sensing range. A measurement over a 200 km fiber-loop is performed, with a 3 meter spatial resolution and an accuracy of ± 3 MHz (2σ) at the end of the sensing fiber. To the best of our knowledge, this is the best result obtained with a Brillouin sensor without Raman amplification.

Citation Download Citation

S. Le Floch, F. Sauser, M. Llera, and E. Rochat "Brillouin distributed sensor over a 200km fiber-loop using a dual-pump configuration and colour coding", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575K (2 June 2014); https://doi.org/10.1117/12.2057821

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