Optical fiber is the most efficient transmission medium for data transmission. It has several advantages:
fiber optic cable loose tube The frequency band is wider. Good electromagnetic insulation performance. What is transmitted in the optical fiber is a light beam. Since the light beam is not affected by peripheral electromagnetic interference and is not an external radiation signal, it is suitable for long-distance information transmission and high-security requirements. Of course, the difficulty of tapping is an inherent problem. Open fiber optic cables need to be regenerated and retransmitted. Attenuation weakens. It can be said that the signal is a bright spot at short distances and ranges. Because the interval between repeaters is increased, the number of repeaters in the entire channel can be reduced, which can reduce costs. According to tests by Bell Labs, when the data transmission rate is 420Mbps and the distance is 119 kilometers without a repeater, the bit error is 10-8, which shows that the transmission quality is very good. Coaxial cables and twisted pairs require a repeater every few kilometers. In applications where optical cables are used to interconnect multiple minicomputers, the one-way characteristics of optical fiber must be considered. If two-way communication is to be carried out, double-stranded optical fiber should be used. Due to the need to multiplex transmission and multiplex selection of light of different frequencies, multiplexers have appeared in the communication device market. Installing fiber optic cables in a normal computer network starts with the user equipment. Because optical cables can only transmit in one direction. In order to achieve full communication, optical cables must appear in pairs, one for input and one for output. The endpoint of the optical cable is connected to the optical interface.
Fiber Channel is required to install fiber optic cables. loose tube When connecting each optical cable, go to the optical end and grind it with the optical fiber interface through electric barbecue or chemical ring chlorination process to ensure that the optical channel is not blocked. Fiber optics cannot be stretched too tight or formed at right angles.
The type of optical fiber is determined by the mold material (glass or plastic fiber) and the size of the core and outer layer. The size of the core determines the quality of light transmission. loose tube fiber optic cable Commonly used fiber optic cables include: 8.3μm core, 125μm outer layer, single mode.
62.5μm core, 125μm outer layer, multi-mode.
50μm core, 125μm outer layer, multi-mode.
100μm core, 140μm outer layer, multi-mode.
