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Proceedings Paper

Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater
Author(s): Xabier Angulo-Vinuesa; Marcelo A. Soto; Sonia Martin-Lopez; Sanghoon Chin; Juan Diego Ania-Castañon; Pedro Corredera; Etienne Rochat; Miguel Gonzalez-Herraez; Luc Thévenaz
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Paper 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.

Paper Details

Date Published: 26 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421C9 (26 October 2012); doi: 10.1117/12.2013201
Show Author Affiliations
Xabier Angulo-Vinuesa, Consejo Superior de Investigaciones Científicas (Spain)
Marcelo A. Soto, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Sonia Martin-Lopez, Consejo Superior de Investigaciones Científicas (Spain)
Sanghoon Chin, Omnisens S.A. (Switzerland)
Juan Diego Ania-Castañon, Consejo Superior de Investigaciones Científicas (Spain)
Pedro Corredera, Consejo Superior de Investigaciones Científicas (Spain)
Etienne Rochat, Omnisens S.A. (Switzerland)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)
Luc Thévenaz, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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