Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater

Xabier Angulo-Vinuesa; Marcelo A. Soto; Sonia Martin-Lopez; Sanghoon Chin; Juan Diego Ania-Castañon; Pedro Corredera; Etienne Rochat; Miguel Gonzalez-Herraez; Luc Thévenaz

doi:10.1117/12.2013201

26 October 2012 Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater

Xabier Angulo-Vinuesa, Marcelo A. Soto, Sonia Martin-Lopez, Sanghoon Chin, Juan Diego Ania-Castañon, Pedro Corredera, Etienne Rochat, Miguel Gonzalez-Herraez, Luc Thévenaz

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421C9 (2012) https://doi.org/10.1117/12.2013201
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this paper we combine the use of optical pulse coding and seeded second-order Raman amplification to extend the sensing distance of Brillouin optical time-domain analysis (BOTDA) sensors. Using 255-bit Simplex coding, the power levels of the Raman pumps and the Brillouin pump and probe signals were adjusted in order to extend the real physical sensing distance of a BOTDA sensor up to 120 km away from the sensor interrogation unit, employing a 240-km long loop of standard single-mode fiber (SSMF) with no repeater. To the best of our knowledge, this is the first time that distributed measurements are carried out over such a long distance with no active device inserted into the entire sensing loop, constituting a considerable breakthrough in the field.

Citation Download Citation

Xabier Angulo-Vinuesa, Marcelo A. Soto, Sonia Martin-Lopez, Sanghoon Chin, Juan Diego Ania-Castañon, Pedro Corredera, Etienne Rochat, Miguel Gonzalez-Herraez, and Luc Thévenaz "Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421C9 (26 October 2012); https://doi.org/10.1117/12.2013201

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