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Proceedings Article

Design of free space optical omnidirectional transceivers for indoor applications using non-imaging optical devices

[+] Author Affiliations
Navik Agrawal, Christopher C. Davis

Univ. of Maryland, College Park (United States)

Proc. SPIE 7091, Free-Space Laser Communications VIII, 709107 (August 19, 2008); doi:10.1117/12.798172
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From Conference Volume 7091

  • Free-Space Laser Communications VIII
  • Arun K. Majumdar; Christopher C. Davis
  • San Diego, California, USA | August 10, 2008

abstract

Omnidirectional free space optical communication receivers can employ multiple non-imaging collectors, such as compound parabolic concentrators (CPCs), in an array-like fashion to increase the amount of possible light collection. CPCs can effectively channel light collected over a large aperture to a small area photodiode. The aperture to length ratio of such devices can increase the overall size of the transceiver unit, which may limit the practicality of such systems, especially when small size is desired. New non-imaging collector designs with smaller sizes, larger field of view (FOV), and comparable transmission curves to CPCs, offer alternative transceiver designs. This paper examines how transceiver performance is affected by the use of different non-imaging collector shapes that are designed for wide FOV with reduced efficiency compared with shapes such as the CPC that are designed for small FOV with optimal efficiency. Theoretical results provide evidence indicating that array-like transceiver designs using various non-imaging collector shapes with less efficient transmission curves, but a larger FOV will be an effective means for the design of omnidirectional optical transceiver units. The results also incorporate the effects of Fresnel loss at the collector exit aperture-photodiode interface, which is an important consideration for indoor omnidirectional FSO systems.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Navik Agrawal and Christopher C. Davis
"Design of free space optical omnidirectional transceivers for indoor applications using non-imaging optical devices", Proc. SPIE 7091, Free-Space Laser Communications VIII, 709107 (August 19, 2008); doi:10.1117/12.798172; http://dx.doi.org/10.1117/12.798172


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