Astrogate Labs, an Indian deep-tech startup, has announced the development of India’s first indigenous Optical Inter-Satellite Link (OISL) terminal. The system is designed for direct satellite-to-satellite laser communication and marks a shift from space-to-ground optical links to in-orbit connectivity.
Optical Inter-Satellite Link
An Optical Inter-Satellite Link uses laser beams for communication between satellites in space. OISL systems are used in satellite constellations, especially in Low Earth Orbit (LEO), where fast data transfer and reduced dependence on ground stations are required.
AstroLink Micro and Flight Readiness
Astrogate Labs demonstrated its AstroLink Micro system at the 9th Bengaluru Space Expo (BSX 2026) at the Bangalore International Exhibition Centre in Karnataka. The system is a 10 Gbps space-to-ground laser communication terminal, and the company has stated that the new OISL terminal is targeted for full flight readiness by 2027.
Technology Readiness and Testing
Astrogate Labs’ space-to-ground laser communication terminals have reached Technology Readiness Level 8 (TRL 8). TRL 8 is a stage in the technology development scale that indicates a system has been completed and qualified for spaceflight.
Important Facts for Exams
- Optical communication in space uses light, usually laser beams, instead of radio frequency signals.
- Low Earth Orbit satellites typically operate at altitudes of about 160 km to 2,000 km above Earth.
- Technology Readiness Levels are used to measure the maturity of a technology from concept to operational deployment.
- BSX 2026 refers to the 9th Bengaluru Space Expo held at the Bangalore International Exhibition Centre.
Industry and International Linkages
Astrogate Labs has been identified as the sole Indian company to have supplied an indigenously developed satellite-to-ground laser communication terminal to the Indian Space Research Organisation. The startup also completed cross-compatibility testing with the University of Western Australia’s TeraNet mobile optical ground station.
India’s Space Communication Ecosystem
Satellite laser communication is used for high-speed data transfer, lower latency, and secure links in space systems. End-to-end control of such technology is relevant for future LEO satellite constellations and for indigenous space communication infrastructure.
