Network Fabric in Space
Updated October 15, 2026
Satellites linked by lasers into routed networks in orbit, instead of relays that send signals straight back down.
The bottom line
Laser-linked networks in orbit are being launched at scale, but each operator’s mesh is still its own island: making terminals from different makers, and networks from different operators, work together has yet to be demonstrated in orbit.
What is happening
For decades most communications satellites worked as relays: a signal goes up and comes straight back down to a nearby ground station. The shift is to networks in orbit — satellites linked to each other by laser, routing traffic among themselves like a carrier backbone and reaching the ground only where it is useful. Starlink already runs a laser mesh at scale, Amazon Leo and Telesat Lightspeed build laser links into every satellite, and proposals such as Blue Origin’s TeraWave add a backbone layer in medium orbit.
The hard problem has moved from the laser to the network: terminals from different makers must interoperate, standards are still being revised, and there is no settled way for one operator’s mesh to carry another’s traffic.
Latest signals
October 10, 2026The Space Development Agency launched its fourth plane of Tranche 1 satellites, bringing 84 to orbit, with initial warfighting capability planned from 2027.
Sources: Space Development Agency
August 24, 2026Kepler said its first optical data-relay tranche is completing commissioning, calling it the first commercial space data relay service; its 10 optical relay satellites launched in January 2026.
Sources: Kepler Communications
July 16, 2026NASA chose two Starlink mini laser terminals to send 4K video from Orion on Artemis III, citing more than 25,000 Starlink lasers operating in orbit.
Sources: NASA
April 14, 2026ESA picked Kepler (€18.6M) to build a HydRON satellite that will test in orbit whether optical terminals from three different European makers can talk to each other.
Sources: ESA
January 28, 2026A GAO audit found the Space Development Agency had yet to demonstrate an interoperable mesh network; none of its five Tranche 1 optical terminal suppliers had shown an on-orbit link.
Sources: GAO-26-107085
Open challenges
- Links between optical terminals from different makers are unproven in orbit
- Standards keep changing — SDA’s optical terminal standard has gone through several versions, and ESA’s HydRON uses its own
- Pointing, acquisition and tracking between fast-moving satellites still needs long calibration
- No framework yet for one operator’s mesh to carry another operator’s traffic
- Spectrum still matters at the edges — user links and most ground-station links remain radio
Companies to watch
SpaceX, Amazon Leo, Telesat, Blue Origin, Kepler Communications, Space Development Agency, ESA, NASA, DARPA, Northrop Grumman, York Space Systems, Lockheed Martin, Tesat, Mynaric, Aalyria.