Toward the Realization of an Optical Communication Infrastructure

That Seamlessly Connects Space and Earth

NTT and Safran DS Collaborate on Next-Generation Multi-Orbit Optical Ground Communications

November 6, 2026

NTT, Inc. and Safran Data Systems (hereinafter “Safran DS”), a leading space equipment provider with recognized expertise in space communications and ground segment solutions, signed a Memorandum of Understanding (MoU) on November 4, 2026, to explore the possibility of a strategic collaboration aimed at realizing a next-generation optical communication infrastructure that connects various satellites, ranging from low Earth orbit to geostationary Earth orbit, with the ground. Based on this MoU, the two companies will explore the integration of NTT’s digital coherent technology*1 and network control technology*2 into Safran DS’s optical ground stations for optical connections between satellite networks and ground-based data infrastructure, as well as their connection to the ground-based APN*3. Furthermore, they will examine the applicability of these optical ground stations to multi-orbit satellite networks.

This collaboration with Safran DS applies the IOWN technology promoted by NTT to the space sector and is one of the initiatives aimed at realizing the IOWN concept*4. Background and Objectives In recent years, driven by the expansion of satellite constellations, the growing utilization of Earth observation data, progress in the space data center concept, and the increasing sophistication of space exploration missions, there is growing expectation for the use of optical communication technology—capable of high-capacity, low-latency data transmission that surpasses conventional RF (radio frequency) communication—as a communication infrastructure connecting space and the ground. Furthermore, as the practical application of satellite constellations comprising multiple orbits—such as LEO, MEO, and GEO—and data relay services progresses, expectations are rising for space-to-ground optical connections capable of supporting multiple orbits.

Under the IOWN concept, NTT is working to realize a next-generation communications infrastructure that leverages digital coherent technology, APN, and advanced network control technologies. Meanwhile, Safran DS has a proven track record in space communications systems—including satellite ground stations, tracking antennas, and TT& and high data rate reception modems—and has developed a complete portfolio of optical ground stations for LEO, MEO and GEO applications called “IRIS OGS.”

The two companies have now begun collaborating to leverage their respective technologies and expertise to realize a next-generation optical communications infrastructure that connects multi-orbit satellite networks with ground-based data infrastructure via optical links.

Scope of the Collaboration

Under this collaboration, NTT and Safran DS will explore the integration of NTT’s digital coherent technology and network control technology into Safran DS’s optical ground stations to assess the potential for their use across multiple orbits. The two companies will begin by establishing communication capabilities between low Earth orbit satellites and optical ground stations and will proceed in stages with the technological development of a next-generation optical communication infrastructure that integrates multi-orbit satellite networks with terrestrial networks. Furthermore, by connecting selected optical ground stations to nearby data centers via APN, they will work to establish a future space data distribution infrastructure that seamlessly connects satellites, optical ground stations, and terrestrial data networks via optical communication.

Future Developments

NTT is working to realize a space data distribution infrastructure that integrates multi-orbit  satellite networks with IOWN, and under its space business brand “NTT C89*5”, will promote the creation of new services that integrate space and Earth, as well as the expansion of business opportunities.