What is the transmission rate and transmission distance of optical fiber?

Optical fiber transmission speed, light speed c = 299792458m s (generally 300000000m s).

The speed of light in the vacuum of optical fiber is the maximum speed of the movement of objects in nature that has been found so far, and the actual transmission of light in air, water, glass (optical fiber), plastic and other media is the application of the refractive index The speed of light in the vacuum is divided by the refractive index.

Optical fiber transmission is generally carried out using optical cables, and the data transmission rate of a single optical fiber can reach several Gbps, and the transmission distance can reach tens of kilometers without the use of repeaters. Optical fiber is a very convenient tool for transmitting signals, and one of the slender light stamen of the cable can replace more than 1,000 physical communication lines to complete a large number of long-distance communication work.

Expansion of capital is delayed:

Optical fiber communication has many advantages: it has a large transmission frequency bandwidth and communication capacity; Low transmission loss and long relay distance; The wire diameter is thin, the weight is light, and the raw material is quartz, which saves metal materials and is conducive to the rational use of resources; Strong insulation and anti-electromagnetic interference performance; It also has the advantages of strong corrosion resistance, strong radiation resistance, good turnability, no electric spark code, small leakage, strong confidentiality, etc., and can be used in special environments or military.

The principle of optical fiber communication is: at the sending end, the transmitted information (such as voice) should first be turned into an electrical signal, and then modulated to the laser beam emitted by the laser, so that the intensity of the light changes with the amplitude of the electrical signal (frequency and eye rate), and is sent out through the optical fiber; At the receiving end, the detector receives the optical signal and converts it into an electrical signal, which is demodulated and restored to the original information.

The transmission distance of fiber optics is 10 to 70 kilometers.

The effective transmission distance of an optical fiber depends on the quality of the optical fiber on the one hand, and the type and power of the optical module at both ends of the optical fiber on the other. Generally, the effective transmission distance of multimode optical fiber is several hundred meters, and the maximum power optical module can effectively transmit 2 kilometers. The single-mode fiber can transmit 10 kilometers of 1310 and 40 to 70 kilometers.

The properties of optical fibers are classified as follows:

Single-mode fiber optic transceivers transmit distances from 20 km to 120 km. The transmission distance of multi-mode fiber optic transceiver is 2 km to 5 km, which can be divided into multi-mode fiber transceiver and single-mode fiber transceiver.

Due to the different optical fibers used, the transceiver can transmit different distances, multimode transceivers generally transmit distances between 2 km and 5 km, while single-mode transceivers can cover a range of 20 km to 120 km. It should be pointed out that the transmission power, reception sensitivity and wavelength of the optical fiber transceiver itself will be different due to different transmission distances. <>

Optical fiber transmission speed, light speed c = 299792458m s (generally 300000000m s).

The speed of light in the vacuum of optical fiber is the maximum speed of the motion of natural objects found so far, and the actual transmission of light in air, water, glass (optical fiber), plastic and other media is refractive index.

The application of the speed of light in a vacuum divided by the refractive index.

Optical fiber transmission is generally carried out using optical cables, and the data transmission rate of a single optical fiber.

Can reach a few Gbps without the use of repeaters.

In the case, the transmission distance of Li manuscript can reach tens of kilometers. Optical fiber is a very convenient tool for transmitting signals, and one of the slender light stamen of the cable can replace more than 1,000 physical communication lines to complete a large number of long-distance communication work.

This has nothing to do with the rate of the terminal device, and has nothing to do with the optical fiber itself, and the type of optical fiber can determine the distance of signal transmission.

10GB S is a relatively high-end technology in the current market, which belongs to the current mainstream products, and its application has been quite mature.

The passband of optical fiber is very wide, theoretically up to 3 billion megahertz.

Optical fiber is only a channel, and our current technology only uses a fraction of its bandwidth, and its transmission rate is the rate at which the optical transceiver of the terminal or central office equipment can work.

The backbone layer of the operator can reach 100 Gbit/s.

The main factor that restricts the transmission rate of fiber optic signals: the cost of equipment. The theoretical rate is at least a few tens of tons, and the laboratory has long exceeded 100G, and 40G cannot be fully realized in practical applications.

With the rapid development of new technologies, the application of G655 optical cable and the successful development of doped optical fiber amplifier (EDFA) have broken the limitation of optical fiber communication transmission distance by optical fiber loss, extended the all-optical communication distance to thousands of kilometers, and brought revolutionary changes to optical fiber communication.

Now it is possible to reach up to 40GBT s, which is not theoretical, but practically achievable.

It must have a lot to do with the equipment.