Application of remote power-by-light switching in a simplified BOTDA sensor network

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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. © 2013 by the authors; licensee MDPI, Basel, Switzerland.

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Bravo, M., Ullan, A., Zornoza, A., Loayssa, A., Lopez-Amo, M., & Lopez-Higuera, J. M. (2013). Application of remote power-by-light switching in a simplified BOTDA sensor network. Sensors (Switzerland), 13(12), 17434–17444. https://doi.org/10.3390/s131217434

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