| Authors: | Y. Yan, J. Van Kerrebrouck, N. Singh, M. Yang, Y. Liu, S. Zhao, Y. Gu, M. Zhao, G. Morthier | | Title: | 100 Gbps Radio over Free Space Communication using Space Diversity Reception based on Photodetector Array | | Format: | International Journal | | Publication date: | Accepted for publication. Not yet published | | Journal/Conference/Book: | Journal of Lightwave Technologie
| | Editor/Publisher: | IEEE/Optica, | | Location: | United States | | Citations: | Look up on Google Scholar
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Abstract
With the rapid advancement of optical communication
technology, radio over free space optical (RoFSO) communication has demonstrated tremendous potential in long distance communication applications due to its high bandwidth and low latency characteristics. An free space optical (FSO) receiver with high optical alignment robustness configured by a single optical
lens is presented. The 10-element photodetector matrix of the
photodetector array (PDA) offers an expansive active detection
area with a responsivity of 1.01 A/W at 1550 nm wavelength. In a 0.35 m FSO demonstration, the z-axis optical alignment tolerance on the condenser lens is evaluated to be as large as 92 μm without crosstalk, demonstrating the robustness of the receiver design.
The multiple output signals from the receiver are used in space diversity. The receiving rate of up to total 100 Gbps (10×10 Gbps) NRZ with a bit error rate (BER) below 10−12 is demonstrated after 25km long distance transmission. The system design and alignment tolerance without a mechanical beam tracking system are presented which verifies its feasibility in a high speed RoFSO
communication system. It further demonstrates the potential for applications in space division multiplexing(SDM) systems. |
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