Low-cost Brillouin optical time domain analysis (BOTDA) distributed sensor setup

Ander Zornoza; Alayn Loayssa

doi:10.1117/12.866351

8 September 2010 Low-cost Brillouin optical time domain analysis (BOTDA) distributed sensor setup

Ander Zornoza, Alayn Loayssa

Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 765334 (2010) https://doi.org/10.1117/12.866351
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal

Abstract

We present a solution for Brillouin optical time domain analysis (BOTDA) long-range distributed sensing that contributes to improve considerably one of the most important problems these sensors have nowadays: the cost of the setup. We achieve this by simplifying the process to obtain a stable frequency shift between pump and Stokes waves. The technique we propose consist in obtaining the Stokes wave from the pump by frequency shifting in two steps: the first one with a so-called passive Brillouin frequency shifter (BFS), and the second one by low-speed modulation. Moreover, we demonstrate preliminary measurements of this system in typical long-range conditions, with 25km of fiber at 1m resolution, highlighting the sensor capacity.

Citation Download Citation

Ander Zornoza and Alayn Loayssa "Low-cost Brillouin optical time domain analysis (BOTDA) distributed sensor setup", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 765334 (8 September 2010); https://doi.org/10.1117/12.866351

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