Long Distance Optical Module Characteristics and Application

As a photoelectric conversion device, optical modules are the most common products in optical communication networks. Among the characteristics of optical modules, the transmission capacity is the core and a major parameter that attracts the most attention. The length of the distance is another core parameter that cannot be ignored. In different fields of optical communication network transmission and access, the required characteristics of optical modules are also different
According to the optical modules different transmission distances , they can be divided into: short-distance optical modules, medium-distance optical modules, and long-distance optical modules. Long-distance optical modules refer to optical modules with a transmission distance of more than 30km, which can meet network data transmission requirement
In the actual use of long-distance optical modules, in many cases the maximum transmission distance of the module cannot be reached. This is because a certain degree of dispersion occurs during the transmission of optical signals in optical fibers. In order to solve this problem, long-distance optical modules use DFB laser as the light source, which avoids the dispersion problem
There are long-distance optical modules in SFP optical modules, SFP+ optical modules, XFP optical modules, 25G optical modules, 40G optical modules, and 100G optical modules. Among them, the long-distance SFP+ optical module uses EML laser components and photodetector components to reduce the power consumption of the optical module while also improve the accuracy; the long-distance 40G optical module uses a driver and a modulation unit in the transmission link, which is The link uses optical amplifiers and photoelectric conversion units to achieve a maximum transmission distance of 80km.
However, the transmission distance of the optical module should adopt appropriate solutions in due course. The long-distance applications are mainly in the fields of server ports, switch ports, network card ports, security monitoring, telecommunications, Ethernet, synchronous optical fiber networks, etc.