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Sensors 2013, 13(12), 17434-17444; doi:10.3390/s131217434

Application of Remote Power-by-Light Switching in a Simplified BOTDA Sensor Network

1,* , 2
1 Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Pamplona 31006, Spain 2 Department TEISA, Universidad de Cantabria, av. Los Castros s/n, Santander, Cantabria, Spain
* Author to whom correspondence should be addressed.
Received: 7 November 2013 / Revised: 11 December 2013 / Accepted: 12 December 2013 / Published: 17 December 2013
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We propose and demonstrate the use of spatial multiplexing as a means to reduce the costs of distributed sensing networks. We propose a new scheme in which remote power-by-light switching is deployed to scan multiple branches of a distributed sensing network based on Brillouin Optical Time Domain Analysis (BOTDA) sensors. A proof-of-concept system is assembled with two 5-km sensor fiber branches that are alternatively monitored using a fast remotely controlled and optically powered optical switch. The multiplexed distributed sensor fibers were located 10 km away from the interrogation unit and a Raman pump is used to remotely power the switch. Furthermore, the deployed BOTDA unit uses an alternative configuration that can lead to simplified setups.
Keywords: BOTDA sensor; remote sensing; optical switch; sensor network BOTDA sensor; remote sensing; optical switch; sensor network
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Bravo, M.; Ullan, A.; Zornoza, A.; Loayssa, A.; Lopez-Amo, M.; Lopez-Higuera, J.M. Application of Remote Power-by-Light Switching in a Simplified BOTDA Sensor Network. Sensors 2013, 13, 17434-17444.

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