Optical fibers transmit signals in the form of optical pulses, using glass or plexiglass as the network transmission medium. It consists of a fiber core, a cladding, and a protective sleeve. Optical fibers can be classified into single-mode fibers and multimode fibers. Today, Inline Closure manufacturers share the characteristics and manufacturing process of fiber optics: First, the reason why the fiber optic cable is developing rapidly is that it has the following characteristics: 1. The transmission bandwidth is very wide and the communication capacity is large; 2. Small transmission loss and long relay distance, especially suitable for long-distance transmission; 3. Strong anti-lightning and anti-electromagnetic interference capability; 4. Confidentiality is not easy to be eavesdropped or intercepted; 5. Small size and lightweight; 6. Low bit error rate and high transmission reliability; Second, the manufacturing process of optical cable is generally divided into the following processes: 1. Screening of optical fibers: Fibers with excellent transmission characteristics and acceptable tension are selected. 2. Dyeing of optical fiber: It is marked by the standard full chromatogram, and it is required that the high temperature does not fade and does not migrate. 3. Secondary extrusion: The plastic with high elastic modulus and low linear expansion coefficient is extruded into a tube of a certain size, and the optical fiber is incorporated into the moisture-proof and waterproof gel, and finally stored for several days. 4. Cable stranding: stranding a number of extruded fibers with a reinforcing unit. 5. Squeeze cable outer sheath: add a sheath to the stranded cable.