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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 8 — Apr. 9, 2012
  • pp: 8442–8456

High-speed indoor optical wireless communication system with single channel imaging receiver

Ke Wang, Ampalavanapillai Nirmalathas, Christina Lim, and Efstratios Skafidas  »View Author Affiliations


Optics Express, Vol. 20, Issue 8, pp. 8442-8456 (2012)
http://dx.doi.org/10.1364/OE.20.008442


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Abstract

In this paper we experimentally investigate a gigabit indoor optical wireless communication system with single channel imaging receiver. It is shown that the use of single channel imaging receiver rejects most of the background light. This single channel imaging receiver is composed of an imaging lens and a small photo-sensitive area photodiode attached on a 2-axis actuator. The actuator and photodiode are placed on the focal plane of the lens to search for the focused light spot. The actuator is voice-coil based and it is low cost and commercially available. With this single channel imaging receiver, bit rate as high as 12.5 Gbps has been successfully demonstrated and the maximum error-free (BER<10−9) beam footprint is even larger than 1 m. Compared with our previous experimental results with a single wide field-of-view non-imaging receiver, an improvement in error-free beam footprint of >20% has been achieved. When this system is integrated with our recently proposed optical wireless based indoor localization system, both high speed wireless communication and mobility can be provided to users over the entire room. Furthermore, theoretical analysis has been carried out and the simulation results agree well with the experiments. In addition, since the rough location information of the user is available in our proposed system, instead of searching for the focused light spot over a large area on the focal plane of the lens, only a small possible area needs to be scanned. By further pre-setting a proper comparison threshold when searching for the focused light spot, the time needed for searching can be further reduced.

© 2012 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2605) Fiber optics and optical communications : Free-space optical communication
(060.4254) Fiber optics and optical communications : Networks, combinatorial network design

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 13, 2012
Revised Manuscript: February 23, 2012
Manuscript Accepted: March 15, 2012
Published: March 27, 2012

Citation
Ke Wang, Ampalavanapillai Nirmalathas, Christina Lim, and Efstratios Skafidas, "High-speed indoor optical wireless communication system with single channel imaging receiver," Opt. Express 20, 8442-8456 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-8-8442


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