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.
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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.
Bravo M, Ullan A, Zornoza A, Loayssa A, Lopez-Amo M, Lopez-Higuera JM. Application of Remote Power-by-Light Switching in a Simplified BOTDA Sensor Network. Sensors. 2013; 13(12):17434-17444.
Bravo, Mikel; Ullan, Angel; Zornoza, Ander; Loayssa, Alayn; Lopez-Amo, Manuel; Lopez-Higuera, Jose M. 2013. "Application of Remote Power-by-Light Switching in a Simplified BOTDA Sensor Network." Sensors 13, no. 12: 17434-17444.