History of Outdoor Optical Cable Development

The evolution of optical cable manufacturing technology in China can be divided into three stages: exploration, development, and expansion. During the exploration stage (1982-1990), outdoor optical cables with tight-buffered structures emerged, but due to their high loss and poor mechanical performance, they were not selected for long-distance transmission. During the development stage (1991-2000), stranded optical cables such as GYTA and GYTS became the main types for duct and overhead laying, while central tube optical cables solved the problems of water seepage and high/low temperature issues by adding steel tape armor. During the expansion stage (2001-2010), to meet the needs of access networks, FTTX butterfly optical cables and tight-buffered optical cables with TPU sheaths for 3G outdoor equipment connections emerged.

Future technological trends in outdoor optical cables involve new materials, intelligent technologies, and green technologies. Breakthroughs in new materials include space-division multiplexing optical fibers and liquid-core optical fibers, aiming to increase capacity and reduce transmission loss. Intelligent evolution includes optical cables with self-healing capabilities and optical cables integrating sensors and enabling real-time data upload for the Internet of Things (IoT). Green technology trends encompass the use of biodegradable sheath materials and low-energy manufacturing processes.