Optical Fiber Transmission Loss

The reason why optical fiber replaces the long-distance transmission of the network cable is that optical fiber transmission has low loss, and its loss is mainly divided into the following:

Loss is the loss of light energy caused by the absorption and scattering of the medium (air) and leakage (the fiber can not completely isolate the light, which will lead to the leakage phenomenon) when the light is transmitted in the fiber, and the loss of this part of the energy is dissipated at a certain rate with the increase of the transmission distance.

For example, 1310nm optical module uses 0.35dBm/km to calculate the link transmission loss.

The 1550nm optical module uses 0.20dBm/km to calculate the link transmission loss.

And this loss will also be affected by different rates, and the transmission loss of the link is proportional to the rate.

The generation of dispersion is mainly because the electromagnetic waves of different wavelengths have different speeds when propagating in the same medium, resulting in the different wavelength components of the optical signal arriving at the receiving end at different times due to the accumulation of the transmission distance, resulting in a broadening of the pulse, and then unable to distinguish the signal value. The calculation of the dispersion value is very complicated and is generally used for reference only.

Insertion loss, as long as the interface end of the fiber is connected, not completely sealed, resulting in light leakage and other phenomena, resulting in this insertion loss, generally insertion loss is between 0.15-0.35dbm.

The above is the explanation of optical fiber transmission loss knowledge brought by Shenzhen HDV Phoelectron Technology LTD. The module products produced by the company cover optical fiber module, Ethernet module, optical transceiver module, optical fiber access module, SSFP optical module, SFP optical fiber module and so on. The above module class products can provide support for different network scenarios. For the above products, it is paired with a professional and strong R & D team to provide technical support for customers, and a thoughtful and professional business team to provide quality service for customers in the early consultation and later work.