The scaling down of fibre light sources brings the benefits of this fibre technology to a wide range of applications. These developments have led to a surge of interest in advanced fibre cables for both industrial and military applications. Advanced fibre cables are also used for transmitting high volumes of data in communication systems over long distances for getting very clear images, and in building many sophisticated instruments for a variety of applications. By creating new core designs, adding dopants to the fibre core and cladding, and developing manufacturing processes, engineers achieve advanced fibre-optic cable technology.