NTT and Cailabs Sign MoU to Link Space Optics with Terrestrial Data Centers

NTT and French photonics company Cailabs signed a Memorandum of Understanding this month to explore optical connectivity between satellite networks, ground stations, and terrestrial data infrastructure.

The partnership will examine how NTT’s All-Photonics Network technologies can integrate with Cailabs optical ground stations to connect directly into data centers under the NTT C89 space business.

Routing Lasers from Orbit to Data Centers

Engineers from the 2 companies will combine NTT’s digital coherent transmission and network control software with Cailabs ground station hardware. The project connects selected ground sites to nearby NTT data centers across Japan and international hubs, allowing optical signals from orbit to pass directly into terrestrial networks without converting them into standard electrical data streams first.

Satellite operations have traditionally depended on radio-frequency bands, which face bandwidth congestion and regulatory spectrum caps. Optical laser links carry substantially higher data volumes across orbital paths, but transmitting them through Earth’s atmosphere requires specialized ground receivers capable of correcting beam distortion.

Technical Hurdles in Laser Communications

For network operators and data center landlords across the Asia-Pacific region, orbital laser links offer a way to bypass terrestrial backhaul bottlenecks and connect remote facilities directly to core processing hubs. Direct fiber-to-space links reduce latency for high-throughput cloud workloads and artificial intelligence processing clusters that require massive, uninterrupted data feeds.

Operational risk remains concentrated in atmospheric weather conditions such as heavy cloud cover, rain, and turbulence, which scatter laser signals. NTT plans to manage this vulnerability by orchestrating a distributed grid of optical ground stations, routing orbital data to alternative terrestrial reception nodes when local weather degrades line-of-sight laser performance.

Expanding the Space Communications Portfolio

This initiative builds on earlier steps by the Japanese carrier to secure optical hardware for orbital networks. In June 2026, NTT established a joint venture with Irish photonics manufacturer Mbryonics to develop space-grade optical transceivers, establishing proprietary hardware pipelines across Europe and Asia.

Connecting optical ground stations directly to terrestrial optical networks is a critical step toward making satellite optical communications operational at scale. Our shared objective is to help turn high-capacity optical communications into scalable infrastructure for future satellite services.

Minako Tsumenaga, Senior Vice President and Head of the Alliance Division at NTT’s Research and Development Marketing Headquarters, confirmed the project aims to establish standardized operational infrastructure across both orbital and terrestrial segments.

Next Steps for Commercial Space Links

The immediate operational phase focuses on testing orchestration protocols between Cailabs ground terminals and NTT core optical switches. Once integration trials finish, NTT plans to roll out commercial space-data transport services under its NTT C89 space enterprise division.