Companies Hope Lasers Can Replace Radio for Space-to-Ground Comms

2026-03-30 · Source: IEEE Spectrum · Field: Technology & Digital — Emerging Technologies & Innovation, Robotics & Autonomous Systems, Cloud Computing & IT Infrastructure · Depth: Intermediate, short

Summary

Singapore-based deep-tech startup Transcelestial has begun testing its commercial-grade Earth-to-space laser communication terminal in orbit, aiming to overcome radio spectrum limitations for satellite data transmission. The company, which has previously sold ground-to-ground laser terminals, launched its demonstration payload in November aboard the 6GStarLab satellite and plans further launches this year. Unlike SpaceX Starlink's space-to-space laser links, Transcelestial focuses on high-bandwidth Earth-to-space and space-to-Earth laser communication, promising data rates up to 10 Gbps from upcoming satellites, with future potential for 100 Gbps or more. This technology offers significantly higher data capacity and enhanced security compared to radio waves, being more resilient to jamming and interception. Transcelestial aims to make this technology mainstream by reducing costs and building a scalable optical ground station network to mitigate atmospheric interference challenges.

Key takeaway

For telecommunications companies and satellite operators seeking to expand connectivity or enhance data security, you should evaluate laser communication solutions like Transcelestial's. This technology promises fiber-grade bandwidth and improved resilience against jamming, potentially offering a more cost-effective and robust alternative to traditional radio frequency systems, especially for underserved equatorial regions. Consider how a distributed network of optical ground stations could improve data reliability for your operations.

Key insights

Laser communication offers significantly higher bandwidth and security for satellite data transmission than traditional radio waves.

Principles

• Optical systems scale easily for bandwidth.
• Narrow laser beams enhance communication security.

Method

Transcelestial's approach involves deploying a constellation of satellites with laser terminals and a network of cost-effective optical ground stations to ensure reliable, high-bandwidth data transmission by mitigating atmospheric interference through site diversity.

In practice

• Use multiple ground stations to overcome cloud interference.
• Consider laser links for secure, high-throughput data needs.

Topics

• Laser Communication
• Space-to-Ground Links
• Satellite Internet
• Transcelestial
• Optical Ground Stations

Best for: Investor, Research Scientist, Entrepreneur, CTO

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Editorial summary, takeaway, and curation by AIssential. Original article published by IEEE Spectrum.