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Proceedings Paper

200 km fiber-loop Brillouin distributed fiber sensor using bipolar Golay codes and a three-tone probe
Author(s): Zhisheng Yang; Marcelo A. Soto; Luc Thévenaz
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Paper Abstract

Aiming at taking full advantage of bipolar codes, a method using a three-tone probe is proposed to alleviate the probe power limitation imposed by pump depletion in Golay-coded Brillouin distributed fiber sensors. Experimental results validate the technique, which reduces significantly the measurement distortions induced by the gain/loss unbalance resulting from pump depletion/amplification. The method supports a probe power increment of more than 12.5 dB, resulting in low-uncertainty measurements (< 0.9 MHz) at a real 100 km distance, using a 200 km-long fiber loop and 2 m spatial resolution. The method is evaluated with a record figure-of-merit of 380’000.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340J (28 September 2015); doi: 10.1117/12.2195256
Show Author Affiliations
Zhisheng Yang, École Polytechnique Fédérale de Lausanne (Switzerland)
Marcelo A. Soto, École Polytechnique Fédérale de Lausanne (Switzerland)
Luc Thévenaz, École Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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