200 km fiber-loop Brillouin distributed fiber sensor using bipolar Golay codes and a three-tone probe

Zhisheng Yang; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.2195256

28 September 2015 200 km fiber-loop Brillouin distributed fiber sensor using bipolar Golay codes and a three-tone probe

Zhisheng Yang, Marcelo A. Soto, Luc Thévenaz

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96340J (2015) https://doi.org/10.1117/12.2195256
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Zhisheng Yang, Marcelo A. Soto, and Luc Thévenaz "200 km fiber-loop Brillouin distributed fiber sensor using bipolar Golay codes and a three-tone probe", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340J (28 September 2015); https://doi.org/10.1117/12.2195256

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