Wi‑Fi and optical communication: a 362 Gbps chip using VCSEL lasers

Wi‑Fi is not about to vanish overnight, but a new light-based wireless system has delivered a notable step forward for ultra-fast indoor links. In laboratory trials, researchers demonstrated an on‑chip optical technology capable of reaching 362.7 Gbps, using beams of light rather than the radio waves employed by everyday routers.

What is this 362 Gbps wireless system?

The 362 Gbps wireless system is an optical communication approach designed to send data through the air via tightly directed light. Instead of competing for radiofrequency spectrum with mobiles, routers, headphones, cameras and household devices, it transmits signals using precisely controlled light beams.

According to SPIE’s technical release, the experiment achieved an aggregated throughput of 362.7 gigabits per second, one of the highest results reported for a chip‑scale wireless optical transmitter paired with a free‑space receiver.

How does optical communication outperform traditional Wi‑Fi?

In crowded indoor environments, optical communication offers an obvious advantage: it does not rely on the same radio bands as Wi‑Fi. That means less interference and the ability to create highly directed links-useful in offices, laboratories, data centres and homes packed with connected equipment.

The biggest benefits show up when lots of bandwidth is needed at the same time:

• 8K video streaming with a lower risk of stuttering.
• Virtual and augmented reality with reduced latency.
• Business environments with large numbers of connected devices.
• Rapid transfer of very large files over short distances.
• Less congestion in heavily loaded internal networks.

What role do VCSEL lasers play in this breakthrough?

At the centre of the system are miniaturised VCSEL lasers, components already familiar in high‑speed applications. In the reported tests, the chip used a 5 by 5 emitter array with 21 active lasers, and each one delivered roughly between 13 and 19 Gbps.

By combining these channels, the setup reaches the 362.7 Gbps aggregated figure. The aim is not only higher speed, but also improved energy efficiency; the research coverage indicates a lower energy cost per bit compared with high‑performance Wi‑Fi technologies under similar conditions.

Why doesn’t this mean routers will disappear immediately?

Despite the headline‑grabbing numbers, Wi‑Fi still brings strengths that are hard to replace. It handles obstacles more effectively, can cover whole rooms with relatively little equipment, works with billions of devices already in use, and continues to progress through standards such as Wi‑Fi 7.

Before optical wireless becomes common in everyday homes, it still needs to address practical constraints:

• Light beams may require line of sight or more careful positioning.
• The indoor range tested so far remains shorter than that of many routers.
• Phones, laptops and TVs would need compatible receivers.
• Spaces with physical obstructions would require more transmitting points.
• Costs, standardisation and scaled manufacturing still need to mature.

Where is this technology likely to arrive first?

Early adoption is most likely in places where speed, low latency and efficiency matter more than broad coverage: server rooms, industrial settings, laboratories, workstations, dense offices and indoor areas set up for optical links. In those contexts, the wireless system is more likely to complement Wi‑Fi rather than replace it entirely.

The result suggests wireless connectivity is moving into a more hybrid phase. Wi‑Fi should remain common in homes and public networks, while optical communication could take on ultra‑high‑speed tasks at specific points-where light beams, photonic chips and VCSEL lasers can deliver more performance than a conventional radio network.

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