There are several types of fiber optic cables, and they are differentiated according many construction properties like the core, buffer, fiber count, cable arrangement, sub units, filling, strength member, and outer jacket. Fiber optic cables come in many designs depending on where and how they are deployed. This guide explains fiber optic cable construction, the difference between tight buffer and loose tube structures, and compares eight common cable types used in data centers, enterprise networks, and FTTH. Quick Answer: A fiber optic cable is built in concentric layers. Inside out: glass core (8 to 62. 5 microns) carries the light, glass cladding (125 microns) confines it by total internal reflection, acrylate coating (250 microns) protects the glass, optional 900 micron tight buffer adds handling. Have you ever wondered what makes Fiber optic cables better than traditional copper wires? If so, then do remember that Fiber cables are made with high-grade glass cores and environmental protective sheaths, which can endure everything from residential network connections to underwater links. The following diagram shows the construction of a fiber optic cable. So, let's break it down! The core is the primary part of a. These cables are used mainly for digital audio connections between devices.