Optical fiber transmits signals through light guide, non-conductive, and not afraid of lightning strikes, so there is no need to use grounding protection. According to the transmission mode of light in the optical fiber, we divide it into multi-mode optical fiber and single-mode optical fiber.
Multimode fiber: It can transmit multiple modes of light.
Single-mode fiber: Only one mode of light can be transmitted.
The transmission distance of multimode fiber is relatively short, and the transmission distance of single mode fiber can reach dozens of times that of multimode fiber.
The advantages of using fiber optics also include:
1. When the transmission distance of the information point is greater than 100m, if you choose to use copper cable. It is necessary to add repeaters or increase network equipment and weak current rooms, thereby increasing costs and potential failures. The use of optical fibers can easily solve this problem.
2. There are a large number of electromagnetic interference sources in specific working environments (such as factories, hospitals, air-conditioning rooms, electric computer rooms, etc.). Optical fibers can be free from electromagnetic interference and operate stably in these environments.
3. There is no electromagnetic leakage in the optical fiber, and it is very difficult to detect the signal transmitted in the optical fiber. It is a good choice in places with high confidentiality requirements (such as military, research and development, auditing, government and other industries).
4. In environments with high bandwidth requirements, above 1G, optical fiber is a good choice.
What is the difference between single-mode fiber and multi-mode fiber?
Single-mode fiber uses a solid-state laser as the light source; multi-mode fiber uses light-emitting diodes as the light source; single-mode fiber has a wide transmission frequency and long transmission distance, but because it requires a laser source, the cost is high; multi-mode fiber has low transmission speed and short distance , But its cost is relatively low; single-mode fiber core diameter and dispersion are small, allowing only one mode of transmission; multi-mode fiber core diameter and dispersion are large, allowing hundreds of modes to be transmitted.
