5 May 2012 Evaluation of optical transceivers for mobile FSO applications
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Abstract
In order for mobile optical transceivers to communicate, the transceivers must be able to acquire and maintain a free-space optical link between them despite misalignments due to movement and the effects of atmospheric turbulence. Recently, novel transmitters and receivers, along with specifically designed control algorithms, were proposed that incorporated a fiber-bundle approach for improving the ease of acquiring and maintaining the link between two transceivers. Preliminary transmitter and receiver nodes have been constructed for testing the capabilities of this approach. This paper investigates the performance of a transmitter and receiver pair through experimental methods. The performance is evaluated on several key parameters, including initial acquisition time, up time of the link when perturbed by movement or simulated atmospheric impairment, and the link recapturing time once a connection is lost. The dependence of the key parameters is evaluated for different levels and types of perturbations, as well as design choices at the transmitter and receiver. The results show that the optical control system successfully recovered and maintained the link while the receiver was in motion, although the performance was impacted by the angular misalignment tolerance of the receiver. The strengths and limitations of the approach revealed by the experiments are also discussed, along with paths for further improvements.
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Dayong Zhou, Zhaorui Shi, Wei Yi, Peter LoPresti, Hazem Refai, "Evaluation of optical transceivers for mobile FSO applications", Proc. SPIE 8380, Atmospheric Propagation IX, 83800B (5 May 2012); doi: 10.1117/12.919576; https://doi.org/10.1117/12.919576
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