Brillouin optical time-domain analyzer for extended sensing range using probe dithering and cyclic coding

Iribas, Haritz (Institute of Smart Cities, Universidad Publica de Navarra, Iruñea, Spain) ; Loayssa, Alayn (Institute of Smart Cities, Universidad Publica de Navarra, Iruñea, Spain) ; Sauser, Florian (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Llera, Miguel (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Le Floch, Sébastien (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland)

We present an enhanced performance Brillouin optical time-domain analysis sensor that uses dual probes waves with optical frequency modulation and cyclic coding. The frequency modulation serves to increase the probe power that can be injected in the fiber before the onset of non-local effects and noise generated by spontaneous Brillouin scattering. This leads to higher detected signal-to-noise ratio (SNR), which is further increased by the coding gain. The enhanced SNR translates to extended range for the sensor, with experiments demonstrating 1-m spatial resolution over a 164 km fiber loop with a 3-MHz Brillouin frequency shift measurement precision at the worst contrast position. In addition, we introduce a study of the power limits that can be injected in the fiber with cyclic coding before the appearance of distortions in the decoded signal.


Conference Type:
short paper
Faculty:
Ingénierie et Architecture
School:
HE-Arc Ingénierie
Institute:
Aucun institut
Subject(s):
Ingénierie
Publisher:
Jeju, Korea, Republic of, 24-28 April 2017
Date:
2017-04
Jeju, Korea, Republic of
24-28 April 2017
Pagination:
4 p.
Published in:
Proceedings of the 25th International Conference on Optical Fiber Sensors, 24-28 April 2017, Jeju, Korea, Republic of
DOI:
ISSN:
0277786X
Appears in Collection:



 Record created 2019-03-26, last modified 2019-04-23

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