STL Unveils Innovative Unitube Indoor Optical Fibre Solution at Connected Britain 2025

On September 24, 2025, STL (Sterlite Technologies Ltd), a distinguished player in optical and digital solutions, unveiled its latest technological advancement, the Unitube Single Jacket Indoor Fibre Optic Cable, featuring Multi-Core Fiber (MCF) technology, at the Connected Britain 2025 event. This innovative cable integrates four cores into the same cladding diameter as traditional single-mode fibres (SMF), maintaining a coating size of 250/200 micrometres.

STL stands at the forefront of MCF technology deployment, showcasing real-world applications across underground and duct networks. With a full ecosystem of fibres, cables, and termination solutions, STL's offerings ensure seamless integration into existing infrastructures. The Unitube Single Jacket Indoor Fibre Optic Cable is designed for high performance and safety in demanding indoor settings.

Key Features & Benefits

The MCF technology employed in STL's Unitube cable offers numerous advantages:

- Safety Assurance: This cable is certified under the Construction Products Regulation (CPR) with a EuroClass rating of Cca-s2, d1, a1, signifying exceptional fire resistance. Such certification is crucial for maintaining the integrity of critical infrastructures during fire incidents. As a result, STL’s product is ideally suited for data centres, campus networks, and commercial buildings where adherence to strict fire safety norms is imperative.
- Enhanced Security Features: The cable supports Quantum Key Distribution (QKD) for robust physical-digital encryption, ensuring secure data exchange.
- Future-Ready Performance: The design supports high throughput, catering to the bandwidth requirements of next-generation applications, including AI, 5G, and quantum computing. It offers four times the throughput potential of older fibre varieties.
- Compact Design Efficiency: With MCF technology, multiple cores can fit within a smaller diameter, significantly increasing fibre count without requiring additional space (e.g., 864 fibres with 4 cores equate to 3,456 fibres). This modern design enhances capacity and optimizes operational space.
- High Return on Investment: The deployment of STL's Unitube cable provides a scalable network backbone, facilitating secure and efficient data flows in a single streamlined deployment.

Dr. Badri Gomatam, CTO of STL, remarked, “Our innovative approach and strong global partnerships are key to advancing the adoption of cutting-edge optical technologies. The Unitube Single Jacket Indoor Optical Fibre Cable with MCF is meticulously crafted to meet the rising demands for high-capacity, secure, and future-ready networks. We take great pride in leading the evolution of optical infrastructure supporting next-gen applications.