Sterlite Technologies Limited (STL) has entered a strategic partnership with QNu Labs Private Limited to strengthen research and development in quantum communication over optical fibre infrastructure. QNu Labs, a deep-tech start-up incubated at Indian Institute of Technology (IIT) Madras research park and supported by the National Quantum Mission (Department of Science and Technology, Government of India), is collaborating with STL on this initiative.
As part of the collaboration, QNu Labs successfully tested its Quantum Key Distribution (QKD) solution over STL’s 4-core MCF. The trial enabled secure key exchange across distances up to 170 km, alongside 800 Gbps (gigabits per second) of traditional data throughput. In another demonstration, secure key exchange was achieved over 150 km while carrying 1.8 terabits per second (Tbps) of classical traffic—underscoring the feasibility of integrating quantum security into high-capacity fibre networks.
Similarly, the partnership will blend STL’s advanced fibre-optic technology with QNu Labs’ capabilities in QKD, post-quantum cryptography, and hybrid quantum security. The joint effort will prioritise research, proof-of-concept trials, and potential deployments of quantum-resilient fibre connectivity across India and, subsequently, international markets.
