Introduction of DWDM module and selection of SFP optical module
DWDM SFP is a dense wavelength division multiplexing technology, which can couple light of different wavelengths into a single-core optical fiber for transmission together. The channel interval of DWDM SFP has different intervals such as 0.4nm, 0.8nm, 1.6nm, etc. according to needs. The interval is small and requires additional wavelength control devices. A key advantage of DWDM SFP is that its protocol and transmission speed are irrelevant. Selection of SFP optical module
The transmission distance of the optical module is divided into three types: short-distance, medium-distance and long-distance. The nominal transmission distance of the module model is only used as a classification method and cannot be directly applied in practical applications. Because the optical signal will have a certain loss and dispersion when it is transmitted in the optical fiber, it cannot reach the nominal transmission distance.
Loss is the loss of light energy due to the absorption, scattering and leakage of the medium when light is transmitted in the optical fiber. This part of the energy is dissipated at a certain rate as the transmission distance increases.
The generation of chromatic dispersion is mainly due to the unequal speed of electromagnetic waves of different wavelengths when propagating in the same medium, which causes the different wavelength components of the optical signal to reach the receiving end at different times due to the accumulation of transmission distance, resulting in pulse broadening and inability to distinguish the signal. value.
Therefore, users need to select the appropriate optical module according to their actual networking situation to meet different transmission distance requirements. The actual transmission distance depends on the actual transmit power of the corresponding optical module, the transmission attenuation on the optical path, and the receiving sensitivity of the optical port.
Transmitting optical power and receiving sensitivity are important parameters that affect the transmission distance.
dwdm module
The transmission distance of the optical module is divided into three types: short-distance, medium-distance and long-distance. The nominal transmission distance of the module model is only used as a classification method and cannot be directly applied in practical applications. Because the optical signal will have a certain loss and dispersion when it is transmitted in the optical fiber, it cannot reach the nominal transmission distance.
Loss is the loss of light energy due to the absorption, scattering and leakage of the medium when light is transmitted in the optical fiber. This part of the energy is dissipated at a certain rate as the transmission distance increases.
The generation of chromatic dispersion is mainly due to the unequal speed of electromagnetic waves of different wavelengths when propagating in the same medium, which causes the different wavelength components of the optical signal to reach the receiving end at different times due to the accumulation of transmission distance, resulting in pulse broadening and inability to distinguish the signal. value.
Therefore, users need to select the appropriate optical module according to their actual networking situation to meet different transmission distance requirements. The actual transmission distance depends on the actual transmit power of the corresponding optical module, the transmission attenuation on the optical path, and the receiving sensitivity of the optical port.
Transmitting optical power and receiving sensitivity are important parameters that affect the transmission distance.
dwdm module
.jpg?imageView2/1/w/300/h/200)
