Implementation and Evaluation of a 10 Gbps Real-time FSO Link

Abstract

In this paper, we present and experimentally evaluate a real-time 10 Gbps free-space optical (FSO) link under varying atmospheric conditions. In bandwidthcraving wireless technologies due to the ubiquitous consumption by internet of things devices and requiring high data rate online services, unlicensed FSO systems can be a promising candidate to satisfy the network capacity of the existing data communications technologies. In this work, we verify the experiment using small form-factor pluggable transceivers mounted FPGA as a FSO transmitter and receiver. Here, a high-speed single FSO link is proposed and its performance under turbulence and fog conditions using the dedicated indoor atmospheric chamber is evaluated. We show that the proposed system under the turbulence condition with a scintillation index of 0.35 offers the same data rate as the link under a clear channel, while the bit error rate increases from 10 -12 to 5 × 10 -4 .

Enhancing Resilience of FSO Networks to Adverse Weather Conditions

“…1. Furthermore, a general set of parameters for FSO systems operating at 10 Gbps (at distances between 2.38 km and 12.65 km in the topology analyzed in our paper) discussed, e.g., in [30], [69]- [71], are presented in Table 1. In particular, the used transceivers within the considered urban FSO network are selected to operate at 10 Gbps The operating wavelength is 1550 nm and the normalized electrical SNR is assumed to be a fixed value of 45 dB independent of the link distance.…”

“…1) is provided in [30], [70]. As discussed in [30], [69]- [71], the parameters of all FSO systems should be carefully tuned. In particular, the FSO transmitters implement vertical-cavity surface-emitting laser (VCSEL) operating at 1550 nm and supporting typical FSO optical power of 4-15 dBm.…”