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46-km-Long Raman Amplified Hybrid Double-Bus Network With Point and Distributed Brillouin Sensors

2011; IEEE Sensors Council; Volume: 12; Issue: 1 Linguagem: Inglês

10.1109/jsen.2011.2131128

1558-1748

M. Fernández-Vallejo, David Olier, Ander Zornoza, Rosa Ana Pérez-Herrera, Silvia Díaz, César Elosúa, Cándido Bariáin, Alayn Loayssa, Manuel López-Amo,

Advanced Fiber Laser Technologies

We experimentally demonstrate a 46-km hybrid network that combine point and distributed Brillouin sensors. The proposed sensor network multiplexes low-cost intensity point sensors based on fiber-optic tapers, which are able to measure vibrations in the 0.01 to 50 Hz frequency range. The sensor network with a double-bus is a low noise configuration, which offers a higher optical signal to noise ratio and dynamic range than a single-bus. Thus, the number of sensors to be multiplexed could increase or we could reach further distances. The system also deploys remote distributed Raman amplification to extend the sensing range.