Distributed Sensing Based on Interferometry and Polarization Methods for Use in Fibre Infrastructure Protection

Distributed Sensing Based on Interferometry and Polarization Methods for Use in Fibre Infrastructure Protection

Článek WoS

Fibre optic infrastructures are very important, and therefore, it is necessary to protect them from fibre cuts. Most fibre cuts are caused by digging activity, and many network operators seek appropriate solutions enabling detection of possible unexpected events (predict these cuts) and subsequent network outages. In most cases, there is no need to locate events, and only information regarding the occurrence of the event is sufficient. Direct detection-based distributed fibre optic sensing systems appear to be an appropriate solution, allowing digging to be detected before the fibre breaks. The average power of such signals is relatively small, and there is no interference with other signals in the fibre. We performed laboratory measurements to compare the sensitivity and accuracy of interferometric and polarization systems for acoustic vibrations. In the case of interferometric systems, the reference and sensing arms were in the same cable, and both were subjected to acoustic vibrations.

Fibre optic infrastructures are very important, and therefore, it is necessary to protect them from fibre cuts. Most fibre cuts are caused by digging activity, and many network operators seek appropriate solutions enabling detection of possible unexpected events (predict these cuts) and subsequent network outages. In most cases, there is no need to locate events, and only information regarding the occurrence of the event is sufficient. Direct detection-based distributed fibre optic sensing systems appear to be an appropriate solution, allowing digging to be detected before the fibre breaks. The average power of such signals is relatively small, and there is no interference with other signals in the fibre. We performed laboratory measurements to compare the sensitivity and accuracy of interferometric and polarization systems for acoustic vibrations. In the case of interferometric systems, the reference and sensing arms were in the same cable, and both were subjected to acoustic vibrations.

distributed sensing; digging detection; fibre infrastructure protection; interferometer; polarization

distributed sensing; digging detection; fibre infrastructure protection; interferometer; polarization

MÜNSTER, P.; HORVÁTH, T.; VOJTĚCH, J.

2021

16.04.2019

MDPI

Basel, Švýcarsko

1424-8220

SENSORS

19

8

Švýcarská konfederace

1

11

11

https://www.mdpi.com/1424-8220/19/8/1810

http://hdl.handle.net/11012/180574

sensors-19-01810