The wavelength division SFP module is a passive SFP module. The SFP module itself does not emit laser light. Generally, a beam of light is divided into several beams using optical planar waveguide technology, while ordinary SFP modules are active optical modules. Each module has one emission and one emission. There are two receiving ports, and a laser is used in the transmitting port. In addition, the wavelength division SFP module adopts the wavelength division multiplexing technology, which can effectively save the cost of optical fiber, but ordinary SFP modules cannot.
WDM SFP modules can be divided into XENPAK wavelength division SFP modules, X2 wavelength division SFP modules, GBIC wavelength division optical modules, XFP wavelength division SFP modules, SFP wavelength division SFPl modules, and SFP+ wavelength division SFP modules according to different packaging forms.
WDM SFP modules can be divided into (coarse wavelength division multiplexing) CWDM SFP modules and (dense wavelength division multiplexing) DWDM SFP modules according to different wavelength densities; CWDM SFP modules use coarse wavelength division multiplexing (CWDM) technology, suitable for short Distance transmission is generally used in Gigabit Ethernet and point-to-point networks. DWDM SFP modules use dense wavelength division multiplexing (DWDM) technology, which is suitable for long-distance transmission and is generally used in large-scale network environments such as metropolitan area networks and local area networks.
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