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C-DOT and Sterlite Technologies Ltd. (STL) achieve India's First Quantum Key Distribution (QKD) over Multi-Core Fibre

Published on 17-Apr-2025 07:08 PM

Revolutionizing Quantum Communication: C-DOT and STL Achieve India’s First QKD Over Multi-Core Fibre

In an exciting milestone for India’s digital future, the Centre for Development of Telematics (C-DOT) and Sterlite Technologies Limited (STL) have successfully implemented the first Quantum Key Distribution (QKD) transmission over a 4-core Multi-Core Fibre (MCF). This achievement is not just a technical feat but a step toward building a secure and resilient global quantum communication network.

Understanding QKD and MCF

Quantum Key Distribution (QKD) is a method of encrypting information using the principles of quantum mechanics, offering perfect security. In traditional methods like Diffie-Hellman, security relies on computational complexity, whereas QKD ensures security through the laws of physics. Multi-Core Fibre (MCF) technology allows data transmission across multiple cores within a single fibre, significantly reducing space and cost compared to separate optical fibres for quantum and classical signals.

C-DOT’s Contribution

C-DOT stands as the Centre for Development of Telematics under the Department of Telecommunications (DoT), Ministry of Communications. Their QKD systems have achieved technical excellence, receiving Technology Approval from the Telecommunication Engineering Centre (TEC). This validates their advanced capabilities and marks a significant step in India’s quantum communication ecosystem.

STL’s Role

STL, a global leader in optical fibre manufacturing and network designs, has introduced Multi-Core Fibre (MCF), leveraging Space Division Multiplexing to achieve ultra-high transmission capacity per fibre. Their expertise in building scalable, future-ready networks is pivotal for advancing India’s quantum infrastructure.

Key Milestones and Impact

C-DOT and STL’s collaboration not only demonstrates the technical prowess of these companies but also highlights their commitment to advancing quantum communication. The first QKD transmission over MCF is a testament to cost-efficiency and reliability, setting a new benchmark for future digital networks.

Future-Proofing India’s Digital World

This achievement underscores India’s role in global quantum leadership. As public-private partnerships drive innovation, these collaborations are essential for building secure and resilient national digital ecosystems. The success of C-DOT and STL’s QKD efforts is a foundational step towards India’s journey into the future.

Conclusion

In conclusion, C-DOT and STL’s achievement over India’s first QKD transmission on MCF is a significant milestone in quantum communication. It not only highlights their technical brilliance but also positions them as leading players in advancing secure global networks. This success is crucial for building a digital sovereignty and security foundation, paving the way for India’s global leadership in quantum technologies.


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