Laser Satellite Communication Promises Fiber Speeds

Satellite laser communication is moving from science experiments to commercial deployment. Singapore-based startup Transcelestial has been testing a commercial-grade Earth-to-space laser terminal launched in November 2024, capable of 1 Gbps today and targeting 10 Gbps with upcoming satellites. Unlike radio-based systems like Starlink, laser links can deliver fiber-grade speeds using far fewer satellites — Transcelestial claims 40 satellites could cover the equatorial band versus Starlink's 10,000+. The technology also offers inherent security advantages, as laser beams are nearly impossible to jam without being in the direct line of sight. Lithuania's Astrolight and Germany's Mynaric are also developing space-to-ground laser terminals. Key remaining challenges include atmospheric interference from clouds and turbulence, and the cost of building a scalable global network of optical ground stations.