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High speed free-space optical interconnection (FSOI) is an effective strategy to overcome the bottleneck of short-reach electronic interconnection from chip scale to board level, due to its wide bandwidth, high energy efficiency, low latency and high interconnect density. Here, we propose an accelerating beam enabled reconfigurable FSOI scheme by harnessing its characteristics of diffraction-free, self-healing, and specifically designed trajectory. Then we experimentally demonstrate a proof-of-concept 100 Gbps full duplex FSOI enabled by dual-band 2D Airy beams over 40 cm free-space optical link with a receiver sensitivity of −17.3 dBm at bit error ratio (BER) of ${1}{{0}^{{{ - 9}}}}$. Both O-band and C-band 2D Airy beams can be successfully generated and detected with the help of two C-band spatial light modulators (SLMs). In addition, we experimentally investigate the impact of an obstacle occurring at the free-space optical link on the BER performance. Our experimental results indicate that, the performance of accelerating beam based FSOI is superior to the conventional Gaussian beam enabled FSOI under the same free-space optical link condition. [ABSTRACT FROM AUTHOR]

This paper presents a research of the surface roughness effects on corona-generated electromagnetic interference of long-term operating conductors. The detailed surface morphologies and roughness of typical long-term operating conductors were measured and analyzed. The radio noise measurement system based on the corona cage was discussed and the actual radio noise generated by the conductor in the measured cage was obtained, based on the parameters of the corona cage and the measured data. The radio noise tests were carried out under both dry and wet conditions. Under two types of conditions, the corona intensity was higher on the long-term operating conductors contrasted to the new conductors as a result of the anomalistic surfaces of the long-term operating conductors. The rate of decrease of corona inception voltages between the long-term operating conductors and new conductors was discovered to increase with the raise of surface roughness degree Ra in linear relationship. Approximate linear relation was also discovered between the averaged radio noise deviation and Ra. The rate of decrease of corona inception voltages under wet conditions was slightly higher (about 1%) than that under dry conditions. The difference between the radio noise of long-term operating conductors and that of new conductors was larger (1.3 dB) under wet conditions compared to dry conditions. [ABSTRACT FROM AUTHOR]