Optical Fibre What is Optical Fibre? Optical fibre is a thin strand of glass or plastic used to transmit data as light signals, enabling high-speed and long-distance communication. Explanation Optical fibre networks offer faster speeds and greater bandwidth compared to traditional copper cables. They are widely used in internet services, telecommunications, and data centres. Practical Example of Optical Fibre An internet provider uses optical fibre to deliver ultra-fast broadband connections to residential and business customers.