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    Single mode light module VS multi-mode light module

    2020-12-25 16:15:16
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    Optical module is the device that receives light signal in optical fiber transmission system, which is used to connect two electrical port devices (such as server, switch, etc.) together by optical fiber. According to the different types of optical fiber, optical modules can be divided into single-mode optical modules and multi-mode optical modules. The differences between the two optical modules will be described in detail here.


    About Ruitai (Weihai) Electronic Technology Co., Ltd. Single mode optical module and multi mode optical module


    As the name implies, single-mode optical module is the optical module used together with single-mode optical fiber. With LD or LED with narrow spectral lines as the light source, it can transmit data signals with extremely high bandwidth, so the transmission distance is very long. The multimode optical module is used together with multimode optical fiber, with light-emitting diode or laser as the light source, and the transmission distance is shorter.


    Ruitai (Weihai) Electronic Technology Co., Ltd


    Difference between single - mode and multi - mode light modules


    The following is a detailed list of the differences between single-mode light module and multi-mode light module:


    Transmission Rate and Distance - Both single-mode and multi-mode modules can support 10G and 40G transmission, but the transmission distance is very different. The transmission distance of the multi-mode optical module is about 550 m, while the transmission distance of the single-mode optical module can reach 10 km, 40 km, 80 km or even more.


    Price - Single-mode modules use twice as many devices as multimode modules, so they are slightly more expensive than multimode modules.


    Performance - In general, a single-mode optical module can only be used with a single-mode fiber, and a multimode optical module can only be used with a multimode fiber, not mixed.


    Power consumption - The power consumption of multi-mode optical modules is lower than that of single-mode optical modules.


    Use of single mode/multi-mode light modules


    When using single-mode/multi-mode optical modules, the following points should be noted:


    The working wavelength of optical modules at both ends of optical fiber link is the same. In order to reduce the packet loss rate of data, multi-mode optical module is used for short distance transmission applications, and single-mode optical module is used for long distance transmission applications. Do not greatly bend the optical fiber between the refractive module, to prevent optical fiber loss is too large.


    Ruitai (Weihai) Electronic Technology Co., Ltd


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