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Proceedings Paper

Optical wireless communications for micromachines
Author(s): Dominic C. O'Brien; Wei Wen Yuan; Jing Jing Liu; Grahame E. Faulkner; Steve J. Elston; Steve Collins; Lesley A. Parry-Jones
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Paper Abstract

A key challenge for wireless sensor networks is minimizing the energy required for network nodes to communicate with each other, and this becomes acute for self-powered devices such as 'smart dust'. Optical communications is a potentially attractive solution for such devices. The University of Oxford is currently involved in a project to build optical wireless links to smart dust. Retro-reflectors combined with liquid crystal modulators can be integrated with the micro-machine to create a low power transceiver. When illuminated from a base station a modulated beam is returned, transmitting data. Data from the base station can be transmitted using modulation of the illuminating beam and a receiver at the micro-machine. In this paper we outline the energy consumption and link budget considerations in the design of such micro-machines, and report preliminary experimental results.

Paper Details

Date Published: 1 September 2006
PDF: 8 pages
Proc. SPIE 6304, Free-Space Laser Communications VI, 63041A (1 September 2006); doi: 10.1117/12.680780
Show Author Affiliations
Dominic C. O'Brien, Univ. of Oxford (United Kingdom)
Wei Wen Yuan, Univ. of Oxford (United Kingdom)
Jing Jing Liu, Univ. of Oxford (United Kingdom)
Grahame E. Faulkner, Univ. of Oxford (United Kingdom)
Steve J. Elston, Univ. of Oxford (United Kingdom)
Steve Collins, Univ. of Oxford (United Kingdom)
Lesley A. Parry-Jones, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 6304:
Free-Space Laser Communications VI
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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