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From Nobel-prize winning research to mission-ready secure links

qtlabs is a leading provider of optical and quantum communication systems for space


We build space-ready building blocks and ground-segment hardware that make quantum-secured communication work in real missions. We turn raw quantum data into trusted keys using efficient processing cores, and we support partners with ground-station integration and engineering services—with a clear path toward space standards and certification.

Proven Track Record in Quantum Innovation

Our legacy includes milestone achievements that continue to shape the future of quantum communication:

  • Record-Breaking Free-Space Link: Successfully established a 143 km quantum communication link between La Palma and Tenerife, demonstrating long-distance optical quantum transmission.
  • European First in Space QKD: Executed the first-ever Quantum Key Distribution (QKD) downlink from an orbiting satellite in Europe a feat yet unmatched by any other team.
QKD Downlink Space
First QKD-Downlink from an in-orbit satellite – performed by qtlabs founders and core team – more
Quantum Teleportation over 143 kilometres using active feed-forward – more

Horzontal Free Space Link World Record
World record free-space QKD Link between the Canary Islands – more & more

Advanced Solutions for Optical and Quantum Communications

qtlabs develops and delivers cutting-edge systems for QKD and optical communications. Our solutions are deployed in both terrestrial and space environments, including high-profile initiatives such as:

  • QKDSat (ESA)
  • SAGA (ESA)
  • Delivery of fully-accepted Optical Ground Stations (OGS) for QKDSat
  • Free-space quantum links developed for commercial clients
  • EAGLE-1-compliant OGS systems currently in development
SAGA Mission by ESA | Photo: ©ESA | SAGA for quantum key distribution
QKDSat by ESA | Photo: ©ESA | Image credit: Qinetiq | Artists impression of QKDSat

Flight-Ready Quantum Technology

Our proprietary quantum source for space applications is actively progressing through space qualification procedures, aiming for the final Technology Readiness Levels (TRL), a crucial milestone toward deployment in operational space systems.

Comprehensive Portfolio: Hardware, Software & Consulting

Beyond hardware, qtlabs provides extensive software tools and consultancy to support end-to-end customer needs:

  • Simulation software for satellite and free-space QKD systems
  • Tools for modeling time-, phase-, and polarization dynamics
  • QKD post-processing and security proofing of QKD protocols
  • Compatibility verification for QKD architectures

These services empower satellite manufacturers and system integrators to optimize designs and reduce development time and costs.

Our Team

Our multidisciplinary team of over 50 highly trained professionals includes Ph.D. level experts in physics and engineering. Together, we bring deep experience in

  • Quantum and optical communications
  • Complex project management
  • Space qualification

Trusted by Industry and Institutions

qtlabs is an active contributor to projects involving critical infrastructure, finance, transportation and secure communications. We support both, private enterprises and government bodies, in becoming quantum-ready. With strong partners and customers, we collaborate closely to deliver resilient, future-proof solutions from strategic readiness to practical implementation.

AIRBUS | ERSTE Bank | ESA | deimos | OHB | THALES | Honeywell | ICFO | ThalesAleniaSpace

Our strong Network

As part of a strong alliance of sister companies, we benefit from shared expertise and collective strength. This includes fully fletched QKD and Optical Communication Systems for terrestrial and satellite based free-space applications, as well as fiber based QKD System to build complete QKD infrastructures for maximum security. Combined with an expertise in international business relations, trading and project management.

Quantricx