What Causes Loss in fiber optics transmission?

In this article I’m gonna talk about what causes loss in fiber optics transmission. Let’s learn…

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

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

For example: 1310nm optical module calculates the link transmission loss at 0.35dBm/km,

The 1550nm optical module calculates the link transmission loss at 0.20dBm/km. And this loss will also be affected by different rates, and the transmission loss of the link is proportional to the rate.

Dispersion is mainly caused by the fact that electromagnetic waves of different wavelengths travel in the same medium at different speeds, resulting in different wavelength components of the optical signal arriving at the receiving end at different times due to the accumulation of transmission distances, resulting in pulse broadening and inability to distinguish the signal. value. The calculation of the dispersion value is very complicated and is generally only for reference.

Insertion loss, as long as the interface ends in the optical fiber are butted, not completely sealed, resulting in light leakage and other phenomena, resulting in this insertion loss. Generally, the insertion loss is between 0.15-0.35dbm.

The above is an explanation of the loss knowledge of optical fiber transmission brought by Shenzhen HDV photoelectric Technology Co., Ltd. The module products produced by the company cover optical fiber modules, Ethernet modules, optical fiber transceiver modules, optical fiber access modules, SSFP optical modules, and SFP optical fibers, etc. The above module products can provide support for different network scenarios. A professional and strong R&D team can help customers with technical issues, and a thoughtful and professional business team can help customers get high-quality services during pre-consultation and post-production work.  Welcome you to contact us for any kind of inquiry.