Publication detail

Extended Model of the Restricted Beam for FSO links

POLIAK, J. WILFERT, O.

Original Title

Extended Model of the Restricted Beam for FSO links

Type

conference paper

Language

English

Original Abstract

Modern wireless optical communication systems in many aspects overcome wire or radio communications. Their advantages are license-free operation and broad bandwidth that they offer. The medium in free-space optical (FSO) links is the atmosphere. Operation of outdoor FSO links struggles with many atmospheric phenomena that deteriorate phase and amplitude of the transmitted optical beam. This beam originates in the transmitter and is affected by its individual parts, especially by the lens socket and the transmitter aperture, where attenuation and diffraction effects take place. Both of these phenomena unfavourable influence the beam and cause degradation of link availability, or its total malfunction. Therefore, both of these phenomena should be modelled and simulated, so that one can judge the link function prior to the realization of the system. Not only the link availability and reliability are concerned, but also economic aspects. In addition, the transmitted beam is not, generally speaking, circularly symmetrical, what makes the link simulation more difficult. In a comprehensive model, it is necessary to take into account the ellipticity of the beam that is restricted by circularly symmetrical aperture where then the attenuation and diffraction occur. General model is too computationally extensive; therefore simplification of the calculations by means of analytical and numerical approaches will be discussed. Presented model is not only simulated using computer, but also experimentally proven. One can then deduce the ability of the model to describe the reality and to estimate how far can one go with approximations, i.e. limitations of the model are discussed.

Keywords

Diffraction, Fourier transform, Restricted beam, Elliptical Gaussian beam

Authors

POLIAK, J.; WILFERT, O.

RIV year

2012

Released

16. 8. 2012

Publisher

SPIE

Location

San Diego

ISBN

978-0-8194-9234-0

Book

Proceedings of the Optics & Photonics 2012 Conference on Laser Communication and Propagation through the Atmosphere and Oceans

Pages from

1

Pages to

8

Pages count

8

BibTex

@inproceedings{BUT94722,
  author="Juraj {Poliak} and Otakar {Wilfert}",
  title="Extended Model of the Restricted Beam for FSO links",
  booktitle="Proceedings of the Optics & Photonics 2012 Conference on Laser Communication and Propagation through the Atmosphere and Oceans",
  year="2012",
  pages="1--8",
  publisher="SPIE",
  address="San Diego",
  isbn="978-0-8194-9234-0"
}