Publication detail

Defensive perimeter detection by polarization change of the fibre optic signal

KYSELÁK, M. FILKA, M. GRENAR, D. SLAVÍČEK, K. VLČEK, Č. ČUČKA, M. VÁVRA, J.

Original Title

Defensive perimeter detection by polarization change of the fibre optic signal

Type

conference paper

Language

English

Original Abstract

The accurate measurement of temperature changes is the key skill not only for predictions of various natural phenomena or to detect intrusion of the object. The temperature changes we nowadays measure in local climate zones or Urban Heat Islands. The environmental quality is an essential feature of life quality and to improve it serve many remote sensingbased urban planning indicators, which are the common part of present smart cities. Continuously developing fibre optic sensors allow their benefits to be exploited in more and more applications. Defensive Perimeter Detection by Polarization Change of the Fiber Optic Signal offers an effective possibility to detect quickly and in time disturbing a predefined space. This detection system uses the polarizing properties of light and, in particular, the birefringence of optical fibres. The disclosed detection system focuses on temperature changes that may be caused by external or internal disruption of the site. The main detection equipment is the polarization maintaining optical fibre with the same excitation in both polarization axes. The transmission rate in both axes is in the ideal case the same, but due to birefringence, inhomogeneity, and imperfection of production and next causes the mutual delay of both signals causes the signal polarization state change or even the series of polarization states changes, which can be observed in laboratory conditions and described by known mathematical methods. However, these changes can be transformed by linear polarizer to the intensity changes. This conversion allows the changes significantly easier to evaluate.

Keywords

Fiber sensor, polarization maintaining fiber, optical fiber, birefringence, temperature field disturbance, approximation equations, approximation parameters.

Authors

KYSELÁK, M.; FILKA, M.; GRENAR, D.; SLAVÍČEK, K.; VLČEK, Č.; ČUČKA, M.; VÁVRA, J.

Released

2. 10. 2019

Publisher

SPIE

Location

Strasbourg, France

ISBN

9781510630178

Book

SPIE Remote Sensing Technologies and Applications in Urban Environments IV. 2019

Edition

2019

Pages from

1

Pages to

6

Pages count

6

URL

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11157/2532529/Defensive-perimeter-detection-by-polarization-change-of-the-fibre-optic/10.1117/12.2532529.full?SSO=1

BibTex

@inproceedings{BUT159896,
  author="Martin {Kyselák} and Čestmír {Vlček} and Miloslav {Filka} and David {Grenar} and Karel {Slavíček} and Milan {Čučka} and Jiří {Vávra}",
  title="Defensive perimeter detection by polarization change of the fibre optic signal",
  booktitle="SPIE Remote Sensing Technologies and Applications in Urban Environments IV. 2019",
  year="2019",
  series="2019",
  pages="1--6",
  publisher="SPIE",
  address="Strasbourg, France",
  doi="10.1117/12.2532529",
  isbn="9781510630178",
  url="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11157/2532529/Defensive-perimeter-detection-by-polarization-change-of-the-fibre-optic/10.1117/12.2532529.full?SSO=1"
}