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Distributed Brillouin Fiber Sensor Assisted by First-Order Raman Amplification
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Distributed optical fiber Brillouin sensors provide innovative solutions for the monitoring of temperature and strain in large structures. The effective range of these sensors is typically of the order of 20–30 km, which limits their use in certain applications in which the distance to monitor is larger. In this work, we have developed a new technique to significantly extend the measurement distance of a distributed Brillouin Optical Time-Domain Analysis (BOTDA) sensor. Distributed Raman Amplification in the sensing fiber provides the means to enhance the operating range of the setup. Three Raman pumping configurations are theoretically and experimentally investigated: co-propagating, counter-propagating and bidirectional propagation with respect to the Brillouin pump pulse. We show that some of the amplification schemes tested can extend the measurement range and improve the measurement quality over long distances.
Publication year: 2010
Reference: Félix Rodríguez-Barrios, Sonia Martín-López, Ana Carrasco-Sanz, Pedro Corredera, Juan Diego Ania-Castañón, Luc Thévenaz, and Miguel González-Herráez,
Journal of Lightwave Technology, Vol. 28, Issue 15, pp. 2162-2172 (2010)
Magazine: Journal of Lightwave Technology
Running: No.
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