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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 10 — May. 15, 2011
  • pp: 1583–1589

Enlargement of Beam Coverage in FSO Mobile Network

Dayong Zhou, Peter G. LoPresti, and Hazem H. Refai

Journal of Lightwave Technology, Vol. 29, Issue 10, pp. 1583-1589 (2011)


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Abstract

Pointing, acquisition and tracking of a free-space optical node in a mobile network experiencing misalignment due to adverse factors including vibration, motion and atmospheric turbulence requires a different approach than traditional free-space optical transceivers. A recent fiber-bundle approach for beam steering at the transmitter was investigated to provide continuous beam coverage at the receiver without the application of mechanical devices. Utilizing multiple fibers-lenses sets at the receiver was also proposed to enhance the tolerance of optical link misalignment. This paper investigates the feasibility of applying multiple fibers with a single lens at the transmitter and multiple fiber-lenses sets at the receiver to improve the transmission performance on tolerating link misalignment. Two series of laboratorial experiments were implemented to compare the optical link robustness for different transceiver setups as the fiber-lens distance $({\rm z}_{\rm fl})$ was varied to modify the beam divergence: multi-fiber transmitter working with single-fiber-lens receiver and multi-fiber transmitter working with multi-fiber-lens receiver. The results showed that using multiple fibers in both the transmitter and the receiver reveals significant potential to maximize the up time of the link.

© 2011 IEEE

Citation
Dayong Zhou, Peter G. LoPresti, and Hazem H. Refai, "Enlargement of Beam Coverage in FSO Mobile Network," J. Lightwave Technol. 29, 1583-1589 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-10-1583

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