Hub architecture for infra-red wireless networks in office environments

J. Bellon, M. J N Sibley, D. R. Wisely, S. D. Greaves

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The paper describes a LOS system architecture that allows for a data rate of 155 Mbit/s on both down- and up-links. To achieve this, arrays of vertical cavity surface emitting lasers (VCSELs) are used that emit light of 850 nm and have an output power that is within eye-safety limits. Original theory is presented that permits calculation of the coverage area for a certain launch power and receiver sensitivity. Design equations are presented for the selection of the beam shaping/spreading lens placed in front of the laser arrays. Original results from an experimental testbed compare favorably with theoretical predictions. It is concluded that an 8×8 laser array will cover an area of 1 m by 1 m. The addition of a tracking system would permit multiuser operation with each individual user having access to the full bandwidth of the link.

Original languageEnglish
Pages (from-to)78-82
Number of pages5
JournalIEE Proceedings: Optoelectronics
Volume146
Issue number2
DOIs
Publication statusPublished - 1 Aug 1999

Fingerprint

hubs
Wireless networks
laser arrays
Infrared radiation
Lasers
Surface emitting lasers
Testbeds
Telecommunication links
Lenses
surface emitting lasers
Bandwidth
safety
receivers
lenses
bandwidth
cavities
output
predictions

Cite this

Bellon, J. ; Sibley, M. J N ; Wisely, D. R. ; Greaves, S. D. / Hub architecture for infra-red wireless networks in office environments. In: IEE Proceedings: Optoelectronics. 1999 ; Vol. 146, No. 2. pp. 78-82.
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Hub architecture for infra-red wireless networks in office environments. / Bellon, J.; Sibley, M. J N; Wisely, D. R.; Greaves, S. D.

In: IEE Proceedings: Optoelectronics, Vol. 146, No. 2, 01.08.1999, p. 78-82.

Research output: Contribution to journalArticle

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AU - Wisely, D. R.

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