Fiber optic transmission has many outstanding advantages:
1. Bandwidth: The width of the frequency band represents the size of the transmission capacity. The higher the frequency of the carrier, the larger the frequency band width at which the signal can be transmitted;
2. Low loss: When transmitting 1.31um of light, the loss per kilometer is less than 0.35dB. If transmitting 1.55um of light, the loss per kilometer is smaller, which can reach less than 0.2dB;
3. Light weight: The optical fiber is glass fiber with a small specific gravity, which makes it have the characteristics of small diameter and light weight, and is very convenient to install;
4. Strong anti-interference ability: Because the basic component of the optical fiber is quartz, it only transmits light, does not conduct electricity, and is not affected by the electromagnetic field. The optical signal transmitted in it is not affected by the electromagnetic field. Strong resistance
5, high fidelity: because fiber transmission generally does not need relay amplification, it will not introduce new non-linear distortion due to amplification. As long as the linearity of the laser is good, it can transmit TV signals with high fidelity
