Data Centers Explore Photonics to Replace Copper Wiring and Reduce Energy Consumption

The Challenge of Copper in Data Centers

Data centers consume large quantities of copper, with a typical 100MW facility using around 400 tonnes. While most copper is for power and cooling infrastructure, up to 20 tonnes is specifically for network wiring that connects computer servers. This wiring, which transfers data as electrons, is identified as a bottleneck for speed and a significant source of heat.

Photonics as an Alternative

Industry experts and researchers are exploring photonics, a technology that uses light (photons) for data transmission, as a replacement for copper wiring within data centers. Light has been used for long-distance communication via optical fiber for decades, and the goal is to extend this technology to internal data center networks. This involves integrating optical components directly with electrical ones, sometimes at the chip level.

Energy Efficiency and Capacity Benefits

A primary benefit of photonics is its reduced heat generation compared to electrical data transfer. Less heat directly translates to lower energy requirements for cooling data center systems, potentially leading to substantial energy savings. Additionally, photonics allows for multiple data streams to be transmitted through the same channel, increasing overall data capacity within the facility.

Overcoming Manufacturing Hurdles

While the concept of photonics has been researched for years by academics and commercial entities, its widespread adoption has been hindered by manufacturing challenges. However, recent advancements suggest that the technology is now maturing and ready for broader implementation, paving the way for its integration into data center infrastructure.