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"Sandwich" chip breaks the limit of data transmission rate

Update time : 2022-11-23 10:04:43

Engineers from California Institute of Technology and the University of Southampton in the United Kingdom cooperated to design an electronic chip integrated with a photonic chip (using light to transmit data), creating a tightly combined final product that can transmit information at ultra-high speed and generate the least heat at the same time. The research paper was recently published in IEEE Journal of Solid State Circuits.
Although the dual chip "sandwich" is unlikely to find a way out in laptops, the new design may affect the future of data centers that manage large amounts of data communications.
Just as the laptop will heat up when it is used, the server in the data center will also heat up when it is working, but by a much larger margin. Some data centers are even built underwater to make it easier to cool the entire facility. Theoretically, the higher their efficiency is, the less heat they generate and the more information they manage.
The data processing is completed on the electronic circuit, and the data transmission can be effectively completed using photonics. It is very challenging to realize ultrahigh speed in both aspects, but it is more difficult to design the interface between them.
To meet this challenge, the team designed electronic chips and photonic chips from scratch and jointly optimized them to work together. It took four years from the initial idea to the final test in the laboratory.
Researchers say that the entire system must be optimized at the same time to achieve superior power efficiency. These two chips are actually made for each other and are integrated in three dimensions.
The resulting optimized interface between the two chips enables them to transmit 100 gigabits of data per second, while generating only 2.4 pJ of heat per transmitted bit. Compared with the most advanced technology, this will improve the electro-optical power efficiency of transmission by 3.6 times.

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