A real-time SiPM-based receiver for FSO communication
Silicon photomultipliers (SiPMs) are photon-counting detectors based on single-photon avalanche diodes which have the potential to detect single photons in the visible spectrum. In this paper, we present an embedded real-time communication system based on the Xilinx Zynq-7000 FPGA platform with a 1mm-sq SiPM demonstrating the full potential of low power single-photon communication. The experimental results show that the implemented real-time system archives a Bit Error Rate (BER) smaller than 10-3 with 1.1nW of incident optical power at 100Kbps. In addition, the SNR calculation under different optical power is compared to the theoretical SNR to demonstrate the system’s dynamic range.
The Univ. of Edinburgh (United Kingdom)