1. The frequency band of optical fiber is very wide, theoretically up to 3 billion megahertz.
Using advanced coherent optical communication, 2000 optical carriers can be arranged in the range of 30000 GHz for wavelength division multiplexing, which can accommodate millions of channels.
2. Uninterrupted length of tens to 100 kilometers, while ordinary copper wire (data line) is only a few hundred meters.
At present, practical optical fibers all use high-purity quartz (SiO2) materials, and the attenuation can be reduced to 0.2dB/KM near the optical wavelength of 1550nm, which is close to the theoretical limit. Therefore, its interruption distance can be very far.
3. The optical fiber is not affected by the electromagnetic field and electromagnetic radiation, that is, there is no interference.
Optical fiber is a non-metallic dielectric material. Its basic component is quartz (SiO2), which only transmits light, is not conductive, and is not affected by electromagnetic fields. The optical signals transmitted in it are not affected by electromagnetic fields.
4. Light weight and small size.
Because the optical fiber is very thin, plus a waterproof layer, reinforcement, sheath, etc., the diameter of the optical cable composed of 4 to 48 optical fibers is less than 13mm, which is much smaller than the diameter of the standard coaxial cable of 47mm, and the optical fiber is glass The fiber has a small specific gravity, so that it has the characteristics of small diameter and light weight, and the installation is very convenient.
5. Optical fiber communication transmission is not live, safe to use, low loss, can be used in flammable and explosive dangerous places.
Optical fiber transmission loss also has two characteristics. First, it has the same loss in all cable TV channels. It does not need to be equalized by an equalizer like cable trunks. Second, its loss hardly changes with temperature, so there is no need to worry about the environment. Temperature changes cause fluctuations in mains levels.
6. The temperature range of the use environment is wide, hardly affected by any environment.
Because the loss during fiber transmission hardly changes with temperature, there is no need to worry about fluctuations in the level signal due to changes in ambient temperature.
7. Strong chemical resistance and long service life.
The material of the optical fiber itself is quartz (SiO2), and the outer packaging material is generally special engineering plastic, which has extremely high corrosion resistance, so it has a strong adaptability to the environment and has the characteristics of acid and alkali resistance.
8. It has inherent secrecy and will not disclose sensitive information or data.
Because the optical fiber only transmits light, is not conductive, and is not affected by the electromagnetic field, it has a strong resistance. Because of this, the signal transmitted in the optical fiber is not easy to be eavesdropped, which is conducive to secrecy.
