Optical wireless communications with low voltage self-powered sensor motes

Dominic C. O'Brien; Jing-Jing Liu; Wei Wen Yuan; Grahame E. Faulkner; Steve J. Elston; Steve Collins

doi:10.1117/12.735599

25 September 2007 Optical wireless communications with low voltage self-powered sensor motes

Dominic C. O'Brien, Jing-Jing Liu, Wei Wen Yuan, Grahame E. Faulkner, Steve J. Elston, Steve Collins

Proceedings Volume 6709, Free-Space Laser Communications VII; 67090A (2007) https://doi.org/10.1117/12.735599
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Optical wireless channels that use modulated retro-reflectors can provide low-data rate communications to self-powered 'smart-dust' motes. The retro-reflectors are illuminated using a base station that incorporates diffractive beamsteering to direct radiation onto the motes, and these return the radiation to an imaging receiver within the base station. The motes consist of a photodiode to provide power, a novel logarithmic receiver to receive data from the base station, and a modulating retro-reflector to send information from the mote to the base station. Several of the components elements of this system have been implemented and tested. In this paper we report a logarithmic receiver that can be self powered by the source communicating with it, and a retro-reflecting LC modulator component that operates at 30b/s when driven at 0.7V. In addition an overall system model, together with the challenges for future work are presented.

Citation Download Citation

Dominic C. O'Brien, Jing-Jing Liu, Wei Wen Yuan, Grahame E. Faulkner, Steve J. Elston, and Steve Collins "Optical wireless communications with low voltage self-powered sensor motes", Proc. SPIE 6709, Free-Space Laser Communications VII, 67090A (25 September 2007); https://doi.org/10.1117/12.735599

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