On October 1, 1974, Taihan Fiberoptics established a communication infrastructure for Korea to connect to a bigger world. Since that moment, Korea connected with the world and realized the world's first 5G and Taihan Fiberoptics has always been a part of this network innovation. In this article, we will introduce five prominent Korean fiber optic cable manufacturers, highlighting their profiles, key products, and innovation efforts. Their innovative products, including the newly developed Micro Drop Duct, are designed to improve speed and efficiency while reducing costs and disruption during. Since established in 1991, HYESUNG Cable amp; Communication INC. OPTICAL MEASUREMENT, OPTICAL LIGHT SOURCE, OPTICAL POWER METER (OPM), EDFA (Eribium Doped Fiber. 3 Fiber Optic Cable manufacturers listed. The. Awarded as an Excellent Venture Company2007.