STL Completes Multi-Core Fibre Trials with Colt in London Network
Filing Summary
Sterlite Technologies Limited (STL) has announced the successful completion of Multi-Core Fibre (MCF) trials in collaboration with Colt Technology Services. The trials were conducted across Colt’s London metro optical network, marking a significant milestone in the validation of MCF technology. The trials involved STL’s Multiverse™ Multi-Core 4-core Fibre, achieving an 800 Gbps line rate over distances of 9 km and 63 km. Comprehensive testing, including Chromatic Dispersion and Polarization Mode Dispersion, was conducted. This collaboration highlights STL’s role in advancing high-capacity, cost-efficient network solutions for AI and digital services.
Sterlite Technologies Limited (STL) has announced a collaboration with Colt Technology Services for the successful execution of Multi-Core Fibre (MCF) trials across Colt’s London metro optical network. This development represents a significant milestone in the real-world validation of MCF technology as a sustainable and high-capacity backbone for next-generation networks. The trials were conducted in London, UK, and focused on supporting AI, cloud, and digital services.
The filing does not specify any financial terms or payment structures related to the collaboration between STL and Colt Technology Services. The focus of the announcement is on the technical and operational aspects of the MCF trials.
During the trials, STL’s Multiverse™ Multi-Core 4-core Fibre was deployed. This fibre is built within the same cladding diameter as standard single-mode fibre (SMF) and was tested over distances of approximately 9 km and 63 km within Colt’s London Metro network. An 800 Gbps line rate was achieved, with validation performed for 100GE and 400GE services. Comprehensive testing included Chromatic Dispersion (CD), Polarization Mode Dispersion (PMD), Crosstalk, Throughput, Fault analysis, OTDR, Loss, and Optical Return Loss (ORL) measurements, all of which delivered satisfactory results. The MCF technology packs 4-cores into the same cladding diameter as standard SMF, maintaining a coating size of 250/200 micrometres and achieving ultra-high transmission capacity per fibre.
The trials are part of STL’s efforts to take MCF from laboratory environments to real-world applications. The technology is designed to meet the high-density, ultra-low latency, and resilient connectivity demands of AI, hyperscale cloud, and next-generation digital ecosystems worldwide. The collaboration with Colt Technology Services highlights the potential for MCF technology to serve as a cost-efficient backbone for future network infrastructure.
The trials were conducted in the London metro area, with STL and Colt Technology Services as the primary entities involved. The filing does not specify any additional timelines or future milestones related to the collaboration.
Colt Technology Services is focused on delivering high-capacity, sustainable network solutions. The company is committed to pushing the boundaries of optical networking to meet the growing demand for bandwidth without compromising security or performance. This collaboration with STL is part of Colt’s strategy to develop future-ready networks across Europe and the USA.
Sterlite Technologies Limited is a global leader in advanced connectivity solutions, providing end-to-end solutions for building AI-ready infrastructure, FTTx, rural, enterprise, and data centre networks. With manufacturing facilities in North America, Europe, and Asia, STL delivers solutions in more than 100 countries. The company’s business goals are driven by customer-centricity, research and development, and sustainability.