1 September 2006 Optical wireless communications for micromachines
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dominic C. O'Brien, Dominic C. O'Brien, Wei Wen Yuan, Wei Wen Yuan, Jing Jing Liu, Jing Jing Liu, Grahame E. Faulkner, Grahame E. Faulkner, Steve J. Elston, Steve J. Elston, Steve Collins, Steve Collins, Lesley A. Parry-Jones, Lesley A. Parry-Jones, } "Optical wireless communications for micromachines", Proc. SPIE 6304, Free-Space Laser Communications VI, 63041A (1 September 2006); doi: 10.1117/12.680780; https://doi.org/10.1117/12.680780

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