In a recent interview, Franz Dielacher shared key insights on the progress of Task 6.4 in the COREnext project, which focuses on addressing the growing demand for high-speed, energy-efficient data transmission, particularly for telecom systems and data centres.
As the volume of data continues to grow, traditional electrical interconnects are reaching their limits due to signal degradation at higher frequencies and the costly processing needed to maintain signal quality. While optical technologies excel over long distances, they remain complex and expensive for short-range use.
To address this challenge, COREnext is exploring polymer waveguides (plastic optical fibres) as a viable solution for short-range communication (up to a few metres). These fibres offer a strong balance of performance, cost-effectiveness, and ease of integration. The project has already demonstrated over 100 Gbit/s in the D-band (130–170 GHz) and achieved 30 Gbit/s in early H-band (200+ GHz) trials, even using cables not yet optimised for that frequency range. With dedicated materials, the team expects to surpass 100 Gbit/s in the H-band as well.
Franz also highlighted progress in antenna integration, including on-chip, on-board, and antenna-in-package coupling methods—crucial for efficient signal transfer. Key performance indicators such as data rate, energy efficiency (pJ/bit/m), cost per Gbit, and robustness show strong results for polymer fibre technology. Looking ahead, COREnext is planning further dissemination in 2025, including workshops at European Microwave Week and collaboration with academic partners such as KU Leuven.
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