What is the essence of fiber-optic Internet access?

I often see an introduction to the use of fiber-optic fast Internet access on the signboard at the entrance of an Internet cafe. As an internet cafe operator, do you understand the essence of fiber-optic Internet access?

If you do not know, the following article will tell you what fiber optic Internet access is!

An optical fiber is a network transmission medium that uses glass fiber or plastic fiber to transmit data signals. It consists of a fiber core, a package layer, and a protective cover. The structure of the Internet cafe optical fiber is similar to that of the coaxial cable. The center is an optical fiber made of Z glass fiber or transparent plastic, surrounded by protective materials. You can also combine multiple optical fiber cables into one optical fiber cable as needed.

Optical fiber is a media that can transmit optical signals. Its diameter is very small (50 to 100 microns) and its texture is soft. It contains a reflective material with a lower refractive index, called N-layer, which prevents optical signals from refraction.

The optical fiber transmits a bunch of encoded optical signals through internal total reflection. There are two types of light sources at the sending end: Light Emitting Diode LEDs and human injection Laser Diode ILD. There are also two types of receivers (converting optical signals into electrical signals): the diode PIN detector and the APD detector.

Optical fiber has the advantages of broadband, high data transmission rate, and long transmission distance. It has strong anti-interference capability and Low Bit Error Rate. Therefore, the transmission security and confidentiality are extremely good and the price is the highest.

Optical fiber can be divided into multi-mode optical fiber and single-mode optical fiber. Multi-Mode Optical Fiber uses visible light produced by Light Emitting Diode as the light source, and its direction difference is transmitted forward through light reflection, with a transmission distance of less than 2 km. The Single-Mode Optical Fiber adopts a human-injected Laser Diode as the light source, and its orientation is strong. It is transmitted along the axial direction in a single mode without reflection. The performance of single-mode optical fiber is better than that of multi-mode optical fiber.

There are many kinds of optical fiber connectors, which are suitable for single-mode optical fiber and multimode optical fiber, including SC, ST, FC and MT-RJ. In order to establish reliable connections, the optical fiber connector must make the optical fiber almost completely aligned; otherwise, light leakage will occur, resulting in loss of transmitted signals in the optical fiber.

Fiber optic transceiver is an Ethernet transmission switching unit that SWAps short-distance twisted pair electrical signals and long-distance optical signals. It is also called a photoelectric converter or fiber optic converter in many places.

The optical transceiver is a powerful, compact, and flexible network media converter. It converts the electrical signals transmitted on twisted pair wires into optical signals transmitted on the optical fiber, thus, the Ethernet connection distance is extended, breaking the distance limit that the twisted pair can only transmit one 00 meters.