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

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

1,* , 2
,
1
,
1
,
1
 and
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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Abstract

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 3.0).
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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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