CAMBRIDGE, UK – Researchers have unveiled a tiny, chip-scale wireless transmitter that uses infrared lasers to deliver data at a staggering 362.7 Gigabits per second (Gbps). In a study published in Advanced Photonics Nexus on April 2, 2026, the team demonstrated that this “optical wireless” system is not only brutally fast but also twice as energy-efficient as current top-tier Wi-Fi standards.
By switching from crowded radio waves to precisely directed light, the technology provides a practical roadmap for eliminating indoor network congestion in homes, hospitals, and high-density offices.
The Tech: 25 Lasers on a Single Millimeter
The breakthrough relies on a custom-designed 5×5 array of VCSELs (Vertical-Cavity Surface-Emitting Lasers). These are the same energy-efficient infrared lasers found in smartphone FaceID sensors, but optimized here for massive data throughput.
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Massive Parallelism: Each of the 25 lasers can be controlled independently. During testing, 21 active lasers reached individual speeds of up to 19 Gbps, combining for a total throughput of 362.7 Gbps.
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Size Matters: The entire laser array fits on a silicon chip smaller than one millimeter, making it compact enough for integration into future laptops or even smartphones.
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Precision Targeting: To prevent the light beams from interfering with one another, the team designed a custom microlens array that shapes the light into a structured grid of square “illumination zones.“
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Breaking the Energy Barrier
One of the most significant hurdles for high-speed Wi-Fi (like Wi-Fi 7 or the upcoming Wi-Fi 8) is the massive power required to maintain signal integrity at high frequencies.
The laser-powered system circumvents this by using light, which doesn’t require the same complex, power-hungry amplification.
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Efficiency: The system consumes only 1.4 nanojoules per bit of data transmitted.
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The Comparison: This is roughly 50% less energy than the most efficient Wi-Fi technologies currently on the market.
The “Line-of-Sight” Challenge
Unlike traditional Wi-Fi, which can pass through walls and around corners, laser-based communication requires a clear line-of-sight between the transmitter and the device.
“We don’t see this replacing Wi-Fi entirely,” the researchers noted. “Instead, it acts as a high-speed ‘express lane’ for heavy data tasks like 8K streaming or VR, while traditional Wi-Fi handles the general, room-to-room connectivity.”
Future Integration
Looking ahead, the team envisions these tiny laser arrays being built into ceiling light fixtures. Your devices could maintain a standard Wi-Fi connection for mobility but automatically “handshake” with a ceiling laser whenever a direct line-of-sight is established, instantly boosting speeds by 100x while saving battery life.
| Feature | Current Wi-Fi (High-End) | Laser-Powered Wireless |
| Max Speed | ~10–40 Gbps | 362.7 Gbps |
| Energy Per Bit | ~2.8 nanojoules | 1.4 nanojoules |
| Interference | High in crowded areas | Near-Zero (Physical isolation) |
| Barrier Penetration | Yes (Walls/Floors) | No (Requires Line-of-Sight) |
